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2 New LEGO Great Ball Contraptions (GBC)

By Mike Goedecke

Robot arm on a workbench with wires and components.

The concept stems from aRube-Goldberg style contraption, only it is done with Legos. Each module of the the contraption is built so it can connect another. Below is an example of one module and then several connected together.

How complicated a way can you transfer Lego soccer balls from basket to another? Can you do it with or without an RCX controller? Its known in LEGO circles as the GBC .

The homepage for this HD version.

Apple's iOS 26 and iPadOS 26 updates are packed with new features, and you can try them before almost everyone else. First, check Gadget Hacks' list of supported iPhone and iPad models, then follow the step-by-step guide to install the iOS/iPadOS 26 beta — no paid developer account required.

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