My daughter, now 29 months old, has been going to Rolly Pollies since she was 10 months old. She loves it and so do I. The instructors are very friendly, and the ratio is 2-3 instructors to 6-8 kids. The classes begin with songs, then the instructor will explain the set up and different "stations" of the day, then it's free play. We love the flexibility and variety of the different stations. My daughter loves the foam pit! The 45-minute class ends with a couple of songs.