After learning about water conservation with his friends at daycare--and how even the smallest of efforts can make a difference--Caillou looks for ways to save water at home. Because his suggestion of not taking any more baths is vetoed by Mommy, Caillou has to find other ways to conserve--every little drop adds up! This new series, drawn from the popular television series, explores current environmental issues and instills in children an ecological consciousness that will remain with them throughout their lives.