Mould King 26015 GBC Planetary Lift Building Set - 1,009 Piece STEM Educational Construction Toy for Kids & Adults | Space Exploration & Engineering Play | Creative Gift for Birthday & Christmas

This Great Ball Contraption has a straight line mechanism via planetary gears. The stepper ball feed timing has a fine-adjustment through a differential.

Piece together a rotary feeder and an oscillating gate that work in harmony to ensure a seamless journey for the balls through the system.

With over 1000 pieces, this set invites you to explore the fascinating workings of planetary gears and a complex lifting mechanism.