From the rules:
"Fiddlesticks! The toy car was there a minute ago and suddenly it has disappeared. Then comes the usual reprimand that your room is untidy and that you should clean it.
Maybe it’s not your fault and the magic imps are responsible? Sometimes they zip across the children’s room and hide toys in their magic bags! But if you discover the magic bags and work out by touch what is hidden in them, the imps give everything back to you.
In a playful way, motor skills, concentration and rapid reactions are used. In the hectic basic game all players compete simultaneously. But there is also a more peaceful variant."