This is a game that Sam and Ty learned at swimming lessons this year and the kids love playing it at home. The "wolf" stands apart from the others and they ask him "what time is it Mr Wolf?" If the wolf tells them a time (1:00, etc) then they take that many steps forward. If the wolf says "lunchtime" then they run and he tries to catch them.
It's pretty funny to watch Ty be the wolf. The only time he knows (or the only one he likes to say) is "two 'clock." And when he says lunchtime he starts running before he says it.