STEM Builder Kit

STEM Builder Kit

 (2,327+ Reviews)

Turn any conductive object into a computer

No coding, no software, no installation

Works with Mac, Windows, Chromebook and Linux 

$49.00
$49.00 $102.00
SAVE 51% Sold out

BUNDLE & SAVE

STEM Builder Kit

STEM Builder Kit

$49.00
$49.00 $102.00
SAVE 51% Sold out
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The toy they don’t outgrow

Ever bought a STEM toy that got used twice and ended up in a drawer?

It’s not their fault — it’s that most kits have a ceiling. One activity, one outcome, one time. Makey Makey has no ceiling. The banana piano is day one. By week two they’ve built a custom foil game controller. By month one they’re finding projects online and modifying them. By the time they’re a teenager, they’re building things nobody has thought of yet — because 18 remappable keys and any conductive object in existence means the possibilities genuinely never run out.

🎮 Draw your own game controller and play with it

🎸 Build an electric guitar out of cardboard and brass fasteners

🍩 Make donuts control a racing game — yes, really

Every STEM toy promises that kids will learn something. This one skips straight to the part they actually love

Most STEM kits require forty-five minutes of setup, a parent who read the instructions twice, and a child patient enough to wait for the payoff. The banana piano works in under five minutes from box to playing. The first time a child presses a banana and hears a note come out of the computer, something switches on. They immediately want to know what else works. They try a carrot. They try their knee. They try their little sibling. They start drawing controllers, building instruments, designing experiments — not because someone told them to learn about circuits, but because they just made a banana play music and now they have to know what else is possible.

What happened after kids got their kit

94%

said their child set up the banana piano independently within 10 minutes of opening the box

94%

said it was the most consistently used STEM toy they had ever purchased

89%

said the child was still actively inventing new things three months after receiving it

based on our 2025 customer survey

2,800+ makers who figured out what else conducts electricity

  • She asked if bananas could be a piano. She proved everyone wrong in 40 minutes

    My nine-year-old set this up herself and has since tested every object in the house. The playdough drums were genuinely impressive. The cat was less cooperative but she got interesting data.

    — Amanda R., USA

  • He built four game controllers, a staircase alarm, and a broccoli synthesizer. In three weeks

    He’s eleven and usually can’t focus on anything for more than ten minutes. I do not understand the broccoli synthesizer but it produces sound and he is very proud of it.

    — Michelle K., USA

  • Best classroom investment in ten years of teaching

    I bought two kits for my fourth grade class. Every student is active, every student is building something different, and conversations about how it works are happening completely on their own.

    — Karen D., USA

    FAQs

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    Do you need to know how to code?

    Zero programming knowledge required. The board works like a USB keyboard — your computer already knows how to read it.

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    Does anything need to be installed?

    No software or drivers. Plug in via USB and it works immediately on Mac, Windows, Chromebook and Linux.

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    What objects can you use?

    Any conductive object — bananas, oranges, playdough, pencil graphite drawings, foil, plants, water, coins and more. Part of the fun is discovering what conducts and what doesn’t.

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    How many keys does it support?

    The standard board handles 6 inputs. Advanced remapping extends to 18 keys for complex inventions.

    Try it risk-free

    Have questions? Contact our support at support@evedly.com for any questions