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From The Great Ball Contraption Wiki
A GBC Collaboration

What is a Great Ball Contraption?

A great ball contraption (GBC) is a machine which receives soccer balls or basketballs from one module and passes them to another module, rather like a bucket brigade. Modules built according to the GBC standard can be assembled into a collaborative display without pre-planning or modification. The GBC standard is minimal, permitting the builder great flexibility in designing the mechanism by which balls are moved from the input to the output. The otherwise pointless handling of balls, and the myriad ways this is accomplished, gives great ball contraptions the impression of a Rube Goldberg machine.

a stair stepper module

Upcoming GBC Events

North America



  • Brickvention 2018. January 20-21 2018, Royal Exhibition Building, Carlton VIC.
  • Brick-a-laide 2018 - March 30th 31st, 2018, Adelaide Convention Centre, North Terrace, Adelaide, South Australia.
  • Sydney Brick Show 2018, April 21-22, 2018, Penrith Panthers Pavilion, Mulgoa Road Penrith, NSW, Australia
  • BrisBricks Pine Rivers LEGO Fan Expo 2018 - June 9-10, 2018, Strathpine Community Centre, Brisbane QLD, Australia.
  • Japan Brickfest 2018 -Kobe Fan Weekend-. June 9-10, 2018, Rokko Island, Kobe, Japan
  • BrisBricks Brisbane LEGO Fan Expo 2018 - 29th September to 1st October 2018, Chandler Arena, Sleeman Sports Complex, Brisbane QLD, Australia

See also Past Events.

Edit events


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