My 2 year old does a gymnastics class for under 5 year olds. They do a fun circuit that has them balancing, jumping, rolling...whatever the focus of the day is. He loves it! Our 5 year old does something similar to Liviam's. Except ours is called Rookie Sports, they work on a particular sport for a fortnight. Once Buster turns 3 he will join in too instead of his gym class.