Classroom Resource Category: LEGO Not-So-Simple Machines

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Have a link to an awesome LEGO Machine - add it here.

Seventeen-stage LEGO Ball Contraption
This resource: is a video of an incredible 17 stage ball moving contraption.... Rube Goldberg would be proud!!

Ancient Greek Calculating Machine
This resource: is a video of a LEGO model of an ancient Greek celestial calculator.