Young readers discover that sponges are soft-bodied animals that live in oceans and fresh water. Sponges can be very small or very big and come in different colors and shapes. Some sponges are used by fish as hiding places. Although some sponges look like plants, sponges are not plants but animals because they are made of animal cells. Cells, atoms, and molecules are defined. Fundamental science concepts in biology are explained through simply written text and colorful illustrations and photographs.

A pronunciation guide of scientific terms is included. 24 pages. Reading Level 1-3, Interest Level 2-5.