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Best Sellers


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  1. Mechanical Bird


    Engineer a model bird and experiment with gear-driven wings!
  2. Electronics (4-Pack)

    $124.95 $159.80 value

    Shop for advanced electronics favorites and save when purchased as a pack. Qualifies for free shipping!
  3. Butterfly Wings


    Personalize the butterfly wings set with felt stickers and velvet ribbon before flying away!
  4. Chemistry (3-Pack)

    $109.95 $129.85 value

    Save when purchased as a pack. The Chemistry Pack is only eligible for Ground Shipping within the Contiguous United States. Qualifies for free shipping!

    Ignite a passion for science with 2 complete chemistry lab kits. With Glow Lab, you’ll receive a UV light and mix up 3 glowing solutions. With Fire Lab, you’ll create a colorful flame lamp and complete 7 combustion experiments. With Vortex Lab, you'll build a magnetic mixing machine and explore 4 amazing reactions. Recommended for Ages 14+.

    Delivery note: The Chemistry Pack will ship separately from any other items in your order. Your entire order only qualifies for Standard Shipping (delivered within 3-10 business days).
  5. Chomping Mechanical Dinosaur Costume

    $29.95 $20.95

    Build a big green dinosaur costume with matching dino claws. Rawr!
  6. Light-Up Alien Spaceship Costume


    Build a light-up UFO that you can wear around your head, complete with a fetching pair of alien glasses.
  7. Tinker Crate Ultimate (8-Pack)

    $149.95 $199.60 value

    Shop for Tinker favorites and save when purchased as a pack. Qualifies for free shipping!
  8. Light-Up Lantern


    Puzzle together the pieces of an LED-powered lantern, fit for any budding explorer. Sharpen your spatial reasoning skills while crafting with wood, foam, and fabric.
  9. Camping


    Build a glowing campfire, cook up tasty treats, and make a beary fun backpack!
  10. Medieval

    $24.95 $20.95

    Build a working catapult, "dragon" wagon, and a royal castle to explore medieval times!


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Best-Selling Science Kits & STEM Toys

Rich scientific learning needs to have a few of these key elements: curious minds, hands-on projects, quality materials, and fun results. Popular science kits and STEM toys contain all you need to share exciting discoveries with the ones you love most.

With a healthy dose of enthusiasm and the right project, your little scientist will have an unforgettable experience! KiwiCo offers popular science kits that give curious adventurers the ability to tinker, test, and try out their theories! Science can be fun, and that's a theory that can be proven with just the right experiment!