Exploring balance and centres of mass can be great fun. The
resulting structures can seem impossible. Here are some images to
encourage you to experiment with non-breakable objects of your own.
How high can a high jumper jump? How can a high jumper jump higher without jumping higher? Read on...
Help the bee to build a stack of blocks far enough to save his
friend trapped in the tower.
Balancing interactivity with springs and weights.