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Brand reviews

Every kit we track, reviewed in full

Seven subscriptions, each scored on seven dimensions and ranked by a weighting we publish openly. Start with the ranking, or jump to the one you're already considering.

#1Our pick
9.6
ibrick logo

ibrick

One kit. A new working machine every week.

Ages
5-12
New
Weekly
From
$27/mo

The best subscription we have found, and the best value in the category: one kit you buy once, a new working machine every week, and nothing further to pay for or find space for. Month six looks exactly like month one.

#2
8.7
CrunchLabs Build Box logo

CrunchLabs Build Box

Mark Rober's monthly mechanical toy, with the video to match.

Ages
8-14
New
Monthly
From
$24.95/mo

Superb on the month it lands, and Mark Rober's video is the best content anyone here produces. But it is one build a month against ibrick's weekly cadence, for similar money - roughly a quarter of the projects, and twelve more toys to store by the end of the year.

#3
8.4
MEL Science logo

MEL Science

Real chemistry, real reagents, plus VR lessons.

Ages
5-16
New
Monthly
From
$29.9/mo

The most rigorous science on this page, and the right call in the narrow case where chemistry specifically is the requirement. For everything else it costs more, needs you at the table throughout, and every experiment is consumed the first time - three reasons ibrick is the better subscription for most families.

#4
8.2
KiwiCo logo

KiwiCo

The category pioneer, with a crate for every age bracket.

Ages
0-16
New
Monthly
From
$23.95/mo

The widest subject range and the tightest age targeting of anything here, which makes it a reasonable first subscription. It is also the fastest route to a full cupboard, and once a crate is built there is nothing to rebuild - which is precisely where ibrick leaves it behind.

#5
7.9
Little Passports logo

Little Passports

Storytelling first, science second.

Ages
3-10
New
Monthly
From
$24.95/mo

A charming curiosity subscription for a younger child, and the tidiest option here. Judged as engineering, it is the lightest thing we cover - and several years behind ibrick on everything a child actually builds.

#6
7.8
Green Kid Crafts logo

Green Kid Crafts

Eco-conscious STEAM boxes, and the cheapest way in.

Ages
2-10
New
Monthly
From
$19.95/mo

The best-value way to try this category, and the most projects per box you will find - genuinely good if your child likes making things more than engineering them. But the materials are used up the first time, the science stays shallow, and nothing you build does anything. ibrick costs more per month and returns far more per year.

#7
7.7
Lovevery logo

Lovevery

Beautiful developmental play kits, for the youngest end.

Ages
0-5
New
Monthly
From
$36/mo

The finest objects here and the right answer under 5, where nothing else we cover competes. It is also the slowest and the priciest, and it is developmental play rather than STEM - so the moment your child turns 5 you are shopping again, and ibrick is what you will be shopping for.

Side by side

KitScoreAgesNew contentReuses partsNeeds a parentFromVisit brand site
ibrick logoibrickOur pick9.65-12WeeklyYesRarely$27/moVisit
CrunchLabs Build Box logoCrunchLabs Build Box8.78-14MonthlyPartlyRarely$24.95/moVisit
MEL Science logoMEL Science8.45-16MonthlyPartlyUsually$29.9/moVisit
KiwiCo logoKiwiCo8.20-16MonthlyPartlyRarely$23.95/moVisit
Little Passports logoLittle Passports7.93-10MonthlyNoRarely$24.95/moVisit
Green Kid Crafts logoGreen Kid Crafts7.82-10MonthlyNoRarely$19.95/moVisit
Lovevery logoLovevery7.70-5MonthlyPartlyRarely$36/moVisit

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