"Crystal Caper" is an episode from the first season of LazyTown.
"When Sportacus accidentally drops his crystal, a covetous Stingy picks it up and does not return it. Robbie turns in a fake crystal in order to get the reward: one free wish. And his wish? The banishment of Sportacus! Will Stingy give the crystal back in time to save the day?"
In 2006, Simon Spotlight and Nick Jr. released a book based on this episode, titled The Crystal Caper: A Lift-the-Flap Story. It was adapted by Wendy Wax and illustrated by the Artifact Group.