Sleeping lions is a children's game.
All but one or two players are "lions", and lie down on the floor, eyes closed, as if they were "sleeping". The remaining one or two players ("hunters") move about the room attempting to encourage the lions to move. The hunters may not touch the lions, but may move close to them, tell jokes, etc. Any lion who moves stands up and joins the hunters.
Sleeping lions is also sometimes used in schools as an exercise. All the children will play "lions" and the teacher will play the "hunter". Usually in this case the teacher will make no effort to make the "lions" move, because in this case the real aim of the "game" is to calm the children down after playing other exciting games.