The ideal toy for children with a dexterous ability or executives with a need to relieve stress!

Designed to enhance your skills of concentration and creativity, the 173 pieces set creates an entertaining, free standing toy or desktop gadget. The challenge is to design it so the marble will roll down without falling from the spiral run.

Once succeeded, the model will roll the marbles down the spiral run, before the battery-powered chain-drive collects them at the bottom and feeds them back to the top to begin the descent again.

Requires 2 x AA batteries (not supplied)