M.M.
Hello:)
I used to work as a gymnastic assistant at the YMCA in Farmington Hills. I worked with children ages 3-5 and also the little ones 12-36 months which the parents were involved as well. We used to set up little obsticle coarses for them which worked out really well. For example we would have them walk across the balance beam, then do like a row of summersaults (sp?) do a barrel roll down a cheese slice and then crawl through a giant soft tube and finally run from the tube to the wall. Stuff like that. It worked out really well. For the ones were the parents were involved we would do a lot of sing a long songs and have the moms touch their babies hands to their toes and clap and streches and then they could have free access to the gym equipment like a giant playground and would ask us for any assistance if needed. I hope these ideas help a little. It was a lot of fun and the kids LOVED it. :) Good Luck..