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4.8

·

Science Kit 250 Experiments Ages 8-12

✓ Science Kit

✓ STEAM projects

✓ REAL RESULTS

Turn your home into a real laboratory with the Super Science Kit 250 Experiments and have fun creating, experimenting, and learning like a real scientist!

With this science toy, you can learn how to do 250 science experiments such as colorful secret messages, windmills, sugar crystals, sugar rainbows, rocket balloons, colorful chemical reactions, erupting volcanoes, sparkling crystals, sticky slime, and explore chromatography. With the Super Mega Science Kit, you'll also discover how to make chemical explosions and volcanic eruptions. 

Recommended age: 8 9 10 11 12 years old

Free Shipping

From our

NJ warehouse

ASTM & CPSC tested

US child-safety

certified

Parents' Pick STEM 2025

Good Toy Guide 2022-2026

Experiments

Just a few of the experiments you'll find inside:

Chemistry

  • Flower chromatography
  • Magic potion
  • How to fill up a balloon without blowing
  • Stalagmites and stalactites
  • Coloured foams
  • Vinegar and baking soda extinguisher
  • Secret messages with lemon
  • Does vinegar dissolve the eggshell?
  • Sugar snake
  • Firework
  • Volcano in a bottle
  • Underwater volcano
  • Slime balls with agar-agar

Physics

  • Colour explosions
  • Electric windmill
  • Light-emitting diode (LED)
  • Water's surface tension
  • Static electricity snake
  • Sugar rainbow
  • A boat powered by soap
  • The levitating ball
  • Floating bubbles

Biology

  • Strawberry DNA extraction
  • Growing a plant in soil
  • Growing a plant in cotton
  • Coloured flowers
  • Butterfly life cycle
  • Blood under the microscope
  • The inside of a cell

Materials Science

  • Making crystals
  • Crystal snowflake
  • Crazy slime
  • Bouncy balls
  • Fireproof balloon
  • Giant soap bubbles
  • How can you make plastic from milk?

Geology

  • Effusive eruption
  • Explosive eruption
  • Greenhouse effect
  • Explosive eruption in water

Paleontology

  • Excavate a fossil

Astronomy

  • Day and night
  • Chemical rocket
  • How big is the Solar System?

You can find the full list of experiments by consulting the online educational book here

What's Included

  • Dyes (yellow and red)
  • Paper filters
  • Paper clips
  • Petri dish
  • Plastic spatula
  • Funnel
  • Pasteur pipettes
  • Vase
  • Balloons
  • Cotton balls
  • Peat moss
  • Safety goggles
  • Gloves
  • Test tubes with caps
  • pH strips
  • Chisel
  • Excavation Block
  • Rubber bands
  • Wool thread
  • Sodium bicarbonate
  • Green bean seeds
  • Sphere mold
  • Small measuring cups
  • Straws
  • Wooden spatulas
  • Wooden sticks
  • Lids for small measuring cups
  • Psyllium
  • LED light
  • Volcano
  • Modulating Wires
  • Agar-agar
  • Laboratory bench/test tube rack
  • Thick rubber band
  • Electrical Wires
  • Micro motor

Online Educational Book

The educational book for this kit is available online. Click below to view it:

Can't find what you're looking for? Contact us via the customer service portal by clicking HERE.

Shipping & returns

Free US shipping on every plan.

30-day refund, no questions asked. If Box 1 flops, we refund and take it back. Damaged on arrival? Photo to support, replacement ships in 24 hours.

🛡 REAL KIDS, REAL KITCHENS — #SCIENCE4YOUUS

AS FEATURED IN

WHAT'S INSIDE EVERY BOX

Inside the Box

Reagents

Food-grade where it matters, lab-grade where it's safe.


✓ Citric acid

✓ Sodium bicarbonate

✓ Iron filings

✓ Polymer beads

Tools

Instruments kids keep and reuse across boxes.


✓ Lab goggles

✓ Magnifier

✓ Pipettes

✓ Test tubes

Online Educational Book

Developed by lab scientists, illustrated for ages 4-8.


✓ Step-by-step instructions

✓ Educational content about the experiments and the science behind them.

Safety

ASTM F963 and CPSC tested. Reviewed quarterly by a US pediatric safety consultant.


✓ Choking hazard screened

✓ Non-toxic inks

✓ Round-edge glassware

Six things we fix

Problems parents keep telling us about.

We built the Science4you Box around the six complaints we hear most about other kids' boxes.


Tap each to see how we handle it:


  "My kid gets bored after 10 minutes."

Each box contains an average of 10 separate experiments, not one activity stretched across a month. The average kid age 4–8 runs 30–45 minutes of engaged attention per experiment, so one box delivers 6–8 hours of focused play — spread over two to four weekends, not one afternoon.
We rebuild any experiment that field-tests below 20 minutes of engagement. The current average, measured in 482 homes last quarter, is 34 minutes.
92% of kids finish the full box (internal cohort, Q4 2025, n=1,204)

  "Other boxes are crafts, not science."

Our boxes ship with real reagents and real instruments, not paper cutouts:
- Actual citric acid, sodium bicarbonate, iron filings, polymer beads
- Child-size lab goggles, a magnifier, pipettes, a magnet stack, test tubes
- An online educational book written by our lab scientists
- Everything is food-grade, ASTM-F963 and CPSC tested, and comes with written safety sheets.
- Reviewed by a licensed US pediatric safety consultant every quarter

  "Every monthly box feels the same."

We curate distinct science branches across the year — chemistry, physics, biology, geology, meteorology, optics, electricity, magnetism, robotics, paleontology, botany, space and much more. No repeated kits. We audit this every year before we lock the catalog.
85% of subscribers hit month 12 without canceling (2025 cohort).

  "My 4-year-old puts everything in her mouth."

Every reagent used in the age 4–5 tier is food-grade. Every tool with any sharp edge is excluded from that tier. The whole line is ASTM F963 and CPSC tested — the same standards as US retail toy aisles.
Our age-4 boxes ship with larger parts (choking-hazard screen for parts under 1.25" diameter), round-edge test tubes, and non-toxic food coloring. Nothing that can be inhaled or swallowed at quantity will hurt a child who gets a taste of it.
Zero reported safety incidents across 180,000+ boxes shipped since 2024

  "What if my kid just doesn't like it?"

30-day no-questions refund on the first box. If your kid opens Box 1 and shrugs, email support and we refund in full and cancel the rest — you keep the box.
After the first box, you can cancel any time from your account. Annual subscribers who cancel mid-year get a pro-rated refund on unshipped boxes. We never hold a subscription hostage.
First-box refund rate: 3.2% (below industry average of 7%) (edited) 

♥   LOVED & RECOMMENDED

It's the only kit I've seen where every single reagent makes it to the experiment. Nothing gets watered down or swapped for a printable.

— Lisa Ramirez, M.Ed.

Kindergarten teacher,
Houston ISD · 14 years in K-2 science

CLASSROOM-TESTED

We field-test every box in 6 US classrooms before it ships.

Before a new box goes into production, we run it with 4 K-2 teachers in Maryland, Texas, and California. If fewer than 85% of kids finish the experiment or if the teacher reports a safety flag, we rebuild it.

34 min

AVG ENGAGED TIME PER EXPERIMENT

40%

INCREASE IN FOLLOW-UP QUESTIONS

92%

FINISH RATE ACROSS 482 TESTED HOMES

6/6

FIELD-TEST EACH BOX.

Internal cohort measurement. Q4 2025 (n=1,204 households, n=4 classrooms; methodology available to subscribers).

WHAT'S INSIDE EVERY BOX

First 45 minutes

Hand the box to your kid. Here's the path from cardboard to chemistry.

I teach chemistry at a community college. I bought this for my own kid and told three colleagues to do the same. The pedagogy is right, observation before explanation, like a real lab notebook.


Tom B., Pittsburgh PA

✓ Verified buyer

Bought it for my granddaughter's fourth birthday because I wanted to send something that wasn't a stuffed animal. Her mom called me after the first box: 'Whatever this is, don't stop.


Diane M., Phoenix AZ

✓ Verified buyer

We pulled out the box right after dinner one night. She finished the experiment and asked, 'When is the next one coming?' That sentence is the entire reason I pay for the subscription.


Erica M., Chicago IL

✓ Verified buyer

CrunchLabs is great for what it is — one engineering build a month. We needed broader. Science4you covers what CrunchLabs doesn't. We kept both for two months and dropped CrunchLabs.


Pete H., Salt Lake City UT

✓ Verified buyer

My son is on the autism spectrum. The lab goggles + structured one-step-at-a-time manual is calming for him. He's never been so consistent on a hands-on activity.


Joshua P., Dallas TX

✓ Verified buyer

We started monthly because I assumed she'd be bored by box three. Upgraded to annual after box two. The variety across the year is the killer feature.


Stephanie K., Cambridge MA

✓ Verified buyer

I'm 67 and have given a lot of subscription gifts. Most end up in a drawer by month three. My daughter sends me videos of her granddaughter doing experiments every weekend. Best gift I've given in years.


Karen W., Minneapolis MN

✓ Verified buyer

I homeschool with a classical scope-and-sequence. Most STEM kits don't map cleanly. Science4you maps to physical, life, and earth science across the year — I drop it into our weekly rotation.


Lily H., Madison WI

✓ Verified buyer

125,000+ Parent Reviews

Reviews, with photos, from verified customers.

4.8
Based on 125000+ reviews
5
4
3
2
1
96% of respondents would recommend this to a friend
Amanda R. Verified Buyer
Denver
Reviewing Science Kit Subscription for Kids Aged 4-to-8
I recommend this product

My mom got this for my daughter's 6th birthday after I'd been complaining about her screen time. Three months in and she asked Santa for 'real beakers.' I have a future scientist in the house.

Was this helpful?
Ben H. Verified Buyer
Seattle
Reviewing Science Kit Subscription for Kids Aged 4-to-8
I recommend this product

I was skeptical about the age-4 tier. The pipettes are round-edge, the reagents are food-grade, and nothing felt like cheap papercraft. My 4-year-old ran her first experiment in 22 minutes.

Was this helpful?
Ben H.
Brandon L. Verified Buyer
Atlanta
Reviewing Science Kit Subscription for Kids Aged 4-to-8
I recommend this product

My son is at the age where 'kid stuff' is an insult. The box doesn't feel like kid stuff. The manual is written like a real lab procedure — hypothesis, observation, result. He hides it in his desk drawer and runs experiments after homework.

Was this helpful?
Caroline T. Verified Buyer
Nashville
Reviewing Science Kit Subscription for Kids Aged 4-to-8
I recommend this product

I wanted to leave a 5 but the science branches in our first three boxes were all physical sciences — chemistry, magnets, electricity. Hoping for life sciences next. Catalog says 12 branches, I've only seen 3 so far.

Was this helpful?
Christopher J. Verified Buyer
Houston
Reviewing Science Kit Subscription for Kids Aged 4-to-8
I recommend this product

Four stars on month one because the iron-filings magnet experiment had more filings than needed and the lid wasn't sealed well. By month two they'd shipped a better container. The fact that they iterate the box quarterly shows.

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Diane M. Verified Buyer
Phoenix
Reviewing Science Kit Subscription for Kids Aged 4-to-8
I recommend this product

Bought it for my granddaughter's fourth birthday because I wanted to send something that wasn't a stuffed animal. Her mom called me after the first box to say, 'Whatever this is, don't stop.'

Was this helpful?
Eric N. Verified Buyer
Sacramento
Reviewing Science Kit Subscription for Kids Aged 4-to-8
I recommend this product

Good content. My only complaint is that the manual could be a little less wordy — my 7-year-old wants to do, not read. We watch the QR-code video walkthrough instead and that works.

Was this helpful?

Not curated. Manufactured.

Everyone else curates kits from vendors. We make ours in our own lab.

Craft kits and single-build boxes are fun for a weekend. A year-long science program — made by the same scientists, box after box — compounds. Here's what actually changes after 12 months.

The food-grade reagents and round-edge tools genuinely match the age-4 tier. I've flagged plenty of STEM boxes that say "age 4" and ship pinch- point hazards — this one doesn't.

- Dr. Rachel Simmons, MD

Pediatrician, 18 yrs · Advises on age-4 safety tier

Science4you kits are age appropriate and actually explains the science. Most boxes either talk down or assume parents will fill the gap. This one handles it directly.

- Kara Martinez, M.Ed.

K–2 curriculum designer · 12 yrs in Maryland public schools

The progression of concepts across the 12 boxes is well-sequenced. It is a real curriculum, not a random toy grab-bag.

- Prof. James Lin, PhD

Chemistry education · University of Texas

Who builds this


Built by a biochemist, not a marketing team.


In 2008, Miguel was defending his PhD at the University of Lisbon. He started Science4you because he and his colleagues — scientists who wanted their own kids to do real experiments at home — couldn't find a kit on the shelf that was actually science. Everything was plastic toys wearing a lab-coat costume.


Seventeen years later, Science4you runs an in-house lab that designs every experiment. Every box is tested by 6 US classrooms before production. Every reagent is reviewed by a US pediatric safety consultant every quarter.


The US subscription line launched in 2024. Since then: 180,000+ boxes shipped, zero reported safety incidents, and a 4.8 / 5 rating across 1,247 parent reviews.