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Explore the entire CircuitMess collection and discover your next hands-on STEM adventure! From robots to game consoles, there are kits for kids, teens, and adults.

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    Bestsellers Bundle

    Bestsellers Bundle

    Our most popular kits, together for the best price!

    Number of projectsx3
    $339.00
    $447.00-24%
    Ships after May 4th
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    Wacky Collector's Bundle
    10 left

    Wacky Collector's Bundle

    Includes Bit 2.0, plus all 9 Wacky Expansions

    Number of projectsx10
    $125.00
    $169.91-26%

    exclusive

    NASA Artemis Watch 2.0

    NASA Artemis Watch 2.0

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

    $129.00
    Ships after May 4th
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    Beep Boop Bundle
    25 left

    Beep Boop Bundle

    Get all four Beep Boops for a special price

    Number of projectsx4
    $115.00
    $156.00-26%
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    exclusive

    Mars Exploration Bundle

    Mars Exploration Bundle

    Start exploring with a buildable rover and the ready-to-use NASA smartwatch

    Number of projectsx2
    Free tools iconfree tools
    $399.00
    $517.00-23%
    Ships after May 4th
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    Fractions & Decimals Curriculum
    34 left

    Fractions & Decimals Curriculum

    Master math through motion: no parent instruction required

    $29.00
    $59.00-51%

    new

    Beep Boop Kirin
    17 left

    Beep Boop Kirin

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

    $39.00

    bestseller

    Chatter 2.0
    13 left

    Chatter 2.0

    Build & code your own encrypted communicators

    $149.00
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    exclusive

    Rimac Nevera

    Rimac Nevera

    Fully-functional, limited-edition replica of Nevera hypercar

    $149.00
    $199.00-25%
    Estimated ship date: June 2026
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    bestseller

    Coding Bundle 2.0
    Low Stock

    Coding Bundle 2.0

    Learn to code by building & programming three unique game consoles

    Number of projectsx3
    $269.00
    $337.00-20%
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    Gizmo Bundle 2.0
    12 left

    Gizmo Bundle 2.0

    Master electronics and programming by crafting multi-function gadgets

    Number of projectsx3
    $269.00
    $337.00-20%

    new

    Bit Expansion - Mr. Bee
    Low Stock

    Bit Expansion - Mr. Bee

    Unlock a unique Bit game & collect 14 tradable cards

    $8.99

    bestseller

    Clockstar 2.0
    11 left

    Clockstar 2.0

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

    $99.00
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    bestseller

    Retro Bundle 2.0
    25 left

    Retro Bundle 2.0

    Build your own retro console & communication devices

    Number of projectsx2
    $199.00
    $238.00-16%

    bestseller

    Jay-D 2.0
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    Jay-D 2.0

    Make your own DJ mixer and learn about digital sound production

    $169.00
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    Smartwatch Bundle

    Smartwatch Bundle

    Build one, program two - master wearable tech!

    Number of projectsx2
    $199.00
    $228.00-13%
    Ships after May 4th

    new

    ByteBoi 2.0
    6 left

    ByteBoi 2.0

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

    $159.00

    new

    Bit Expansion - Hertz
    18 left

    Bit Expansion - Hertz

    Unlock a unique Bit game & collect 14 tradable cards

    $8.99