Students sit in a circle. One student goes in the middle. The person in the middle must approach one of the people in the centre and say either bop or bop, bippity, bop, bop, bop . If the person in the middle just says bop , then the person in the circle must say nothing. If the person in the middle says bop, bippity, bop, bop, bop , the person in the circle must say bop before the middle person has finished saying bop, bippity, bop, bop, bop . This continues until someone slips and says bop when they are not supposed to, or doesn t say anything when they are supposed to say bop . The person who makes the mistake must go into the middle. If everyone has caught on to this, let the middle person say some different things. She can say Aliens, 1, 2, 3?. The person in the circle who this is said to must react by contorting his face to look like an alien. The people on either side of the alien must hold their hands up to their faces and scream. Or, she can say Hula, hula dancers, 1, 2, 3?. The person in the circle must jump into the middle and do a hula dance and the people on either side of the victim must wave their hands from side to side, hula-like. Or, she can say Viking ships, 1, 2, 3. The person in the circle must put two fingers pointing outwards by his forehead to resemble a Viking ship and the two people on either side must do a rowing action with their arms. Play this game as quickly as possible.