GBC Standards
The canonical source for Great Ball Contraption standards, maintained by Steve Hassenplug—the originator of the GBC concept and its foundational rules.
Resources
GreatBallContraption.com
The home page of Great Ball Contraption and the official source for Brickworld Workshop module building instructions.
Planet GBC
One of the most well-known GBC resources, renowned for its extensive collection of module building instructions.
GreatBallContraption.nl
Maico Arts’ website, featuring a collection of his GBC modules and instructions for building them.
Lego GBC By Lawrie George
Lawrie George’s site focused on GBC, offering well-known resources and helpful articles on running a show.
Great Ball Pit
Matt Norman’s GBC blog, featuring several articles especially helpful for newcomers to Great Ball Contraption.
PV Productions
Trusted destination for comprehensive GBC construction guides, featuring exclusive glow-in-the-dark balls and specialized accessories essential for serious GBC builders.
Philo Lego Motors
Detailed technical specifications for Lego motors, including RPM, torque, and performance characteristics to inform optimal module design decisions.
gears.sariel.pl
Interactive tool for calculating precise gear ratios and exploring mechanical gear configurations to optimize module performance and motion control.