Best for…
Parents who want real chemistry, not just crafts. Kids 4–8 who finish boxes.
Parents of 0–3 year olds focused on developmental milestones.
Households with kids across a wide age range (0 → adult).
Engineering-focused households with kids 8–14+.
Age range (one subscription)
4–8
0–4 (Play Kit + Block Set)
0-8+ across separate subscriptions
8–14+
Lowest price per box (annual plan)
$20.99
$36 (Play Kit, bi-monthly)
$23.95 (Kiwi Crate, annual)
$29.95 (Build Box, annual)
What ships in the box
Real lab reagents + reusable instruments
Wooden play objects + Montessori toys
Project kit (varies by line)
Engineering build + Mark Rober video
Disciplines covered per year
More than 12 – all major sciences
Developmental milestones
4–6 themes per line
1 (engineering)
Real lab reagents
Sometimes
Covers US K-2 science standards (NGSS)
no (different focus)
Partially (varies by line)
no (engineering focus)
Refund policy on first box
30-day full refund — keep the box
Pause only via support
Pause / skip in account
Pause / cancel via support