Mike, Jill and Dad shrink to follow a small frog and must avoid the ""large"" water creatures. Dad teaches Mike and Jill about the frog.
After a test missle explodes, Dr. Pollard asks the Carters for their help in finding a micro-circuit from the wreckage.
The gang explores the backyard for Jill's entemology report.
Mike, Jill and Dad experience the operation of an ant colony from the inside.