u can buy a fluffy ball and they sit down on the ground like a group circle and then they have to toss the ball to a person and say there name quick and then if they don't say it quick or they don't catch it there out.
then u guys can tick tak toe on the board or something or u can get some prize at the end of the day who ever the best student get to pick something out the prize box (put some school equipment and toys and something that students well like in the box) trust me i have 48 kids in my class room