Physical forces make things start moving, change directions, speedup, slow down, and stop moving. A sliding toy moves when a pushing or pulling force makes it slide over a surface. The toy is designed so that the force of friction is reduced. Both the toy's surface and the surface it is sliding over must be smooth. Examples of sliding toys are sleds, air hockey, toboggans, ice skates, and snow boards. Spinning toys such as tops, merry-go-rounds, and pinwheels are discussed along with the forces of gravity and friction. Detailed directions are provided for making a paper pinwheel. A suggested experiment demonstrates the effect of steam from a pot of boiling water that makes a force to cause the pinwheel to spin. Colorful photographs, diagrams and charts aid in understanding the concepts. Includes a table of contents, a glossary, and an index. A good introduction to physical forces for young children. Part of the "Toys and Forces" series. Reviewer: Phyllis Kennemer, Ph.D.