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Build Great Ball Contraptions from existing LEGO sets.

LEGO compatible electronics & accessories.

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Building Instructions

Building Instructions

Explore the wonderful world of Great Ball Contraptions and so much more! Created completely from official LEGO sets!

Electronics for LEGO

Electronics for LEGO

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STEAM Education & Workshops

STEAM Education & Workshops

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GBC Balls
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Spirograph Spinner – 42055 Building Instructions
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GBC 21 Mine Factory – 42055 Building Instructions
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GBC Funnels
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USB Power Box
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GBC 36 Crazy Carnival – 42082 Building Instructions
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GBC Starters Pack
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GBC 53 Marble Music Machine – 42146 Building Instructions
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Latest News

Tomorrow is the day!

November 16, 2023 November 16, 2023

Tomorrow is the big day! The building instructions and video of our latest GBC 52 Flight Fair will be available tomorrow.
For now, let us take a closer look at the cover picture. This Great Ball Contraption is completely made from parts of the official LEGO 42152 Firefighter Aircraft set. Can you spot all the elements?

: GBC 52 Flight Fair – 42152 Alternate Build

: LEGO 42152 Firefighter Aircraft

Buckle up, this plane is about to take off!

November 10, 2023 November 10, 2023

GBC 52 Flight Fair (previously known as LEGO 42152 Firefighter Aircraft set) is being prepped for release on the 17th of November!

Check our socials the upcoming days for exclusive material as we work up to its launch!

: GBC 52 Flight Fair

: LEGO 42152 Firefighter Aircraft