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    • HOLIDAY GIFTS FOR ALL

      Give the Gift of Curiosity

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    • Come Out Swinging with Hydraulic Power

      Build Robo-Boxer and Kangaroo-Bot, then use hydraulic-powered controls to jab, uppercut, and knock your opponent’s head clean off.

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    • Discover How the Sun Powers Motion

      Build a mesmerizing mechanical flower that spins in the sun. SolarFlowers have been honored with multiple awards in 2026, including TIME Best Inventions, Parents Best Toy and more.

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    • ESSENTIAL STEM TOOLS

      You Bring the Questions, We Bring the Tools

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    What’s Your Curiosity?

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    We envision a world where everyone loves to learn.

    Our products inspire kids and families to think deeper, play longer, and figure stuff out. 

    • Heritage Fuels Discovery

      Heritage Fuels Discovery

      With 200+ years of science publishing behind us, we've helped shape the STEM category worldwide. That heritage guides every product decision, from content development to quality standards.

    • Curiosity, Engineered

      Curiosity, Engineered

      We solve engineering problems most toy companies wouldn't attempt. GeckoBot climbs glass, Gecko Run builds marble runs on walls, and the Mega Cyborg Hand, a wearable hydraulic exoskeleton, was the #1-selling science toy in the US in 2025 (Circana).

    • Everyone's a Scientist

      Everyone's a Scientist

      We turn complex science and technology into fun, hands-on experiences for kids and families. From crystal growing to advanced robotics, we make the challenging feel approachable and the approachable feel exciting.

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    Encouraging every kid to be a lifelong learner. Because big discoveries start with big questions, at every age.

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    Something for every kind of learner

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    The best discoveries are worth sharing #ThamesAndKosmos

    • Highly recommend for families looking for a meaningful STEM project to do together.

      Mara L.

    • This kit is a fantastic combination of hands-on building and real learning.

      Benda C.

    • My son asked everyday if we could work on the robot, he loved this project so much.

      Natalie P.

    • My grandson's interest and focus grew him as a critical, imaginative, and fact-based thinker.

      Armas R.

    • Highly recommend for curious kids who enjoy experiments.

      Lena W.

    • My son enjoyed the challenge!

      Finella M.

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