Orii, Eiji

Presents experiments demonstrating properties of circles and loops made of cloth, paper, and string.

Presents experiments using straws, cards, and glasses to demonstrate the pushing force of air.

Presents various optical illusions for the reader to perform which illustrate how visual perception can be distorted.

Presents experiments using marbles to demonstrate what happens when something which is moving hits something else.

Presents various experiments using ping-pong balls with other common objects to understand how air behaves.

Presents experiments, most of which use water, to demonstrate properties of shadow and light.

Presents experiments demonstrating the buoyancy of water.

Presents experiments to demonstrate inertia--the tendency of a moving thing to keep moving and of a thing standing still to stay still.