What takes place inside the body when you inhale and exhale? * Wally Whiskers, a furry little dust bunny, will explain how the body changes inhaled oxygen into exhaled carbon dioxide * See what happens when Wally gets too far inside a nose & the body detects him as a foreign body *

This CD-Rom is compatible with Windows XP or earlier and Mac OS or earlier (not compatible with Inter-based Macintosh computers)