Quick answer
The best STEM toy is the one that matches how your kid already likes to learn: reading and watching, building and coding, or moving and climbing. The five brands we've reviewed in this category map neatly onto those styles, plus one store we'd avoid for now. | Rank | Brand | Best for | Typical price |
|---|---|---|---|
| 1 | Abacus Brands | Book-plus-VR science kits, ages roughly 6 to 12 | $24.99 to $69.99 |
| 2 | Makeblock | Coding robots that grow from blocks to Python | From $149.99 |
| 3 | Nikola Toy | Metal desk toys and model kits for adults and teens | $35.90 to $369 |
| 4 | Funphix | Life-size fort kits and indoor climbers | $67.04 to $499 |
| 5 | Game Kiddy | Not recommended right now | n/a |
1. Abacus Brands: Best overall STEM gift
Abacus Brands earns the top spot because its kits combine a real printed book, an app and hands-on materials at prices that fit a birthday budget. Many carry licenses kids and parents recognize, including Bill Nye, National Geographic, DK and Penn & Teller. The Bill Nye VR Science Kit ($59.99) pairs an 80-page AR-enabled book with VR goggles and 50 pieces for projects like a lava lamp and compass. National Geographic VR titles such as Sharks and World Wonders are $39.99, and the Sharks kit includes a buildable 20-inch Megalodon fossil model. Pixicade ($24.99) turns kids' drawings into playable video games. The catch is that most kits need a smartphone. The FAQ asks for Android 8.0 or later, or an iPhone 6S or newer for full AR features, and tablets won't fit the goggles. Returns are fair but limited: unopened items within 30 days with an RMA and no restocking fee, though you pay return shipping and used items aren't refundable. ## 2. Makeblock: Best coding robot
If your child wants to build and program, Makeblock has the clearest growth path. The mBot2 ($149.99) is an aluminum-framed robot that kids control by phone, gamepad or their own programs, moving from block-based coding to Python. Add-ons extend it for years: the AI Camera 2.0 ($129.99) adds nine ready-made AI functions, mBuild sensor packs start at $47.99, and replacement parts like the $10.99 encoder motor keep a classroom robot running. The company says it was founded in 2013 and claims use in more than 200,000 schools (its own figures). Know the limits before you order. The store only accepts US orders, delivery normally takes 7 to 10 business days after 1 to 3 days of handling, and returns are only for unused, unopened items, with you paying return shipping. Shipping is free over $39.99. Ignore the workshop and trade-show listings with placeholder prices that clutter the catalog. ## 3. Nikola Toy: Best for adult collectors and teens
Nikola Toy isn't a kids' STEM store, but it belongs here for older buyers who like mechanical things on a desk. Its 493 products include machined metal fidget toys, a $369 DIY dual-cylinder engine model kit, RC tanks from $59.90 to about $359 at 1/16 scale, and science display pieces like a noble gas glow tube set. The Mystery Can ($89.90) is a sealed can with one random machined fidget toy and published odds (75% common, 2% legendary). Shipping is free worldwide. Cautions: many product pages have no written description, so specs are thin. No warranty is published, change-of-mind returns are at your cost, and you can only cancel within 5 hours of ordering. Several items are based on film characters without stated licensing. The store also sells slingshots and bows, which are not toys for young kids. ## 4. Funphix: Best for building and active play
Funphix sells something most construction toys don't: kits big enough to climb inside. The 77-piece glow-in-the-dark fort kit is $67.04, themed 93 and 99-piece kits with net sheets and lights run about $78 to $80, and the 154-piece supersized set is $143.09. Its FAQ says every kit is compatible with every other, so you can keep adding pieces as kids grow. The 371-piece Explorer Set ($499) builds climbable structures for ages 12 months and up, with a 5-year guarantee listed. For toddlers, the Pikler Climbing Set with a reversible slide board is $249. The return policy is the drawback: refunds within 30 days come back minus 15% of the purchase price, which is real money on a $500 playset. No shipping policy is published, so check delivery costs at checkout for large items. ## 5. Game Kiddy: Avoid for now
When we checked, Game Kiddy's store showed a "Store unavailable" message with no products, policies or contact details visible. For a kids' toy store, missing age grading and safety information is a deal-breaker. Wait until it publishes a catalog and policies, or buy similar kits from the brands above. ## How to choose a STEM toy that gets used
Match the format to the kid. Readers and screen-watchers do well with Abacus-style book and VR kits. Tinkerers want something that responds to their code, like mBot2. High-energy kids learn spatial reasoning by building forts they can sit in. Check the age label and the parts. Kits with small parts carry choking hazard warnings for children under 3. Funphix's fort kits are labeled 5+, the Pikler set ages 1 to 4, and Abacus kits generally fit elementary to middle school. Look for a growth path. The best STEM toys still work a year later. Makeblock's add-ons and Funphix's cross-compatible kits are both designed for that. A single-use kit is fine as a gift; just don't expect it to last. Count the hidden requirements. Abacus kits need a compatible phone. Makeblock projects need a device to code on. Big playsets need floor or yard space and possibly wall mounting. Factor these in before you buy. Supervise VR and keep sessions short. Phone-based VR goggles are a fun way to explore, but follow the age guidance on the box and take breaks. Read the return policy before opening the box. Abacus and Makeblock only refund unopened items. Funphix deducts 15%. Nikola Toy makes you pay return costs. With gifts, keep the packaging sealed until the birthday. ## Picks by age and interest
- Ages 1 to 4, indoor climbing: Funphix Pikler Climbing Set, $249. - Ages 5+, imaginative building: Funphix 154-piece glow fort set, $143.09. - Elementary-age science fan: Abacus Bill Nye VR Science Kit, $59.99. - Budget gift under $40: National Geographic VR Sharks ($39.99, listed as pre-order when we checked) or Pixicade ($24.99). - Kid ready to code: Makeblock mBot2, then the AI Camera 2.0 later. - Teen or adult desk toy: Nikola Toy Mystery Can.