T.H.
My kids go to Pinnacle Gymnastics in OP, roughly 125th and Antioch. My daughter is 4.5 and has been going since January. She really likes it, it's pretty structured and very "gymnastic-y" but the coaches that she's worked with so far are very good at handling this age group. My son is only 2.5 but starts a class today as well. He's very excited and it's a class designed for his age group so I'm hopeful it will also be a success.
I wasn't sure what to expect either and wasn't even sure what I was looking for. I kinda chuckled at Adansmama's response b/c it could have gone like that for us, but my daughter did love it. The coaches are there to teach skills though and my daughter has learned some good stuff and gotten stronger. They have fun but don't necessarily play games. We don't have any desires to keep her in this for her life or anything, but then again we might, but right now she's having fun so we keep going!