Indian Princess/Prince

Everyone sits in a circle on the floor or chairs. One player leaves the room. While out, another is selected as princess. Then out of room player returns. She finds everyone doing the same thing. For example, they may all be clapping. Then suddenly it changes to everyone shaking their heads, then waving their arms. They all change simultaneously. You must be discreetly attentive! The girl who left must figure out who the leader (princess) is. When the guesser guesses correctly, the princess becomes the new guesser.