How is this place not reviewed? I am only rating for open play. I moved to Frederick from the San Francisco, CA area in one of the worst winters in years. I moved here 7 months pregnant and I had a 2 year old. This place saved us through the winter. It is $ 5 for kids to play for 1.5 hours. I happily pay it each time. We were here at least once a week and often more throughout the winter. My son does not stop running and jumping almost the whole time he is here. He leaves tired and easily goes down for his nap after we visit here. I am looking to sign him up for the summer class and can’t wait to see how much he grows in his ability to follow directions and also physically.