If you have a big classroom or can access a large space, divide the students into two teams. Ask one student from each team "Can you jump, can you run, can you skip, sing, dance" etc (i added actions as i went along). and they have to race to the other end of the space and back doing that action. (for singing they run there and back whilst singing). The winner is the first to come back and shout "yes i can" Silly fun.