S5·E11 Glitter Glitch

Caillou forgets to wash his glittery hands after Miss Martin asks him to, and he leaves a trail of glitter around the preschool. The shiny specks become a mystery until Miss Martin discovers the children playing glitter tag... and Caillou is it! When Miss Martin asks the children to pretend the glitter is cold germs, Caillou realizes the importance of hand washing.