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Spooky STEM Halloween Sale

Our Deals Are Scary Good!

This Halloween, save up to 35% on STEM kits that let you build your own electronic monsters, creepy sounds, and magical gadgets. Shop now... if you dare!

Get a gift with every bundle
    %

    exclusive

    Ultimate STEM Bundle
    31 left

    Ultimate STEM Bundle

    Go from beginner to STEM expert with every CircuitMess kit out there

    Number of projectsx19
    Free tools iconfree tools
    $1,149.00
    $1,669.91-31%
    This item will ship after Dec 5th 2025
    %

    bestseller

    Clockstar 2.0
    6 left

    Clockstar 2.0

    Build & code your own smartwatch and connect it to your phone

    $75.00
    $99.00-24%
    %

    new

    Beep Boop Bundle
    15 left

    Beep Boop Bundle

    Get all four Beep Boops for a special price

    Number of projectsx4
    $99.00
    $156.00-37%
    %

    exclusive

    NASA Artemis Watch 2.0
    22 left

    NASA Artemis Watch 2.0

    A programmable, NASA-themed smartwatch with activity tracking & more

    $99.00
    $129.00-23%
    Synthia

    Synthia

    Build & code an all-in-one sampler, drum machine, sequencer & synth

    $149.00

    bestseller

    ByteBoi

    ByteBoi

    Assemble a retro DIY console, play pre-loaded games, and code your own

    $159.00
    %

    bestseller

    Chatter 2.0
    24 left

    Chatter 2.0

    Build & code your own encrypted communicators

    $119.00
    $149.00-20%
    Wheelson

    Wheelson

    Build and code a self-driving, AI-powered robot car

    $169.00
    %

    new

    Beep Boop Kirin
    Low Stock

    Beep Boop Kirin

    Inventor Beep Boop - your digital pet for techy mini-games

    $27.00
    $39.00-31%
    %

    bestseller

    Jay-D 2.0
    17 left

    Jay-D 2.0

    Make your own DJ mixer and learn about digital sound production

    $129.00
    $169.00-24%
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    Epic Gaming Bundle
    25 left

    Epic Gaming Bundle

    Empower tomorrow's innovators through engineering, coding & gaming

    Number of projectsx6
    $569.00
    $884.00-36%
    %

    bestseller

    Retro Bundle 2.0
    Low Stock

    Retro Bundle 2.0

    Build your own retro console & communication devices

    Number of projectsx2
    $175.00
    $238.00-26%