This 23-minute videotape gives children (grades K-4) a close-up look at what makes the third planet from the sun so special. The answers to the following questions are discussed: (1) Why is there life on Earth? (2) What is our planet made of? and (3) How does the Earth fit into the rest of the universe? A hands-on activity that describes how to build a biosphere is also included. This program is based on the concepts outlined in the National Science Education Content Standards for Earth Science: Properties of Earth Materials, Objects in the Sky, and Changes in Earth and Sky. (WRM)