balance

"When birds spot a tree in the gutter and decide to land and give their tired wings a break, it is up to the reader to help them find the perfect balance on the tree"--OCLC.

Instruction for a variety of simple experiments, using easily available materials, that examine how and why things, people, and animals keep their balance.

Constructions and experiments with different toys and mobiles introduce the basic principles of balancing.

Demonstrates what balance is and how it works through a series of simple experiments.

Investigates, through simple experiments, the basic principles of balance and explores the concepts of gravity, mass, force, and weight.

Discusses the concept of force and how the earth's gravity determines an object's weight. Introduces devices used to measure weight.