Find out the differences and different names of stars and planets
Names and a definition of stars and planets
Tell the children the definitions of planets and stars and place the definitions at either end of the room (so one side of the room is planets and one stars). Then get them all in the middle of the room. Call out the name of a star or a planet and and the kids run to the side they think it is (star or planet). The children on the wrong side of the room are out.