M.T.
My 3yo daughter goes to Bay City Gymnastics. It's in Riverview off Balm Riverview. She LOVES it! We go on Thursdays but there are classes at many different days and times. They keep at 5:1 student/teacher ratio in the 3 and 4 year old classes. It's 45 minutes a week for $50 a month. I hope you find something for your daughters.