My Gym 8890 Centre Park Dr, Columbia, MD21045 My Gymis a children's fitness center that provides facilities, classes, and structured playtime for children…More ages 6 weeks to 13 years old. The classes include games, music, dance, martial arts and sports. Founded in 1983, there are more than 200 locations in more than 25 countries. The Columbia location is well-lit, spacious and has state-of-the-art equipment. The staff is friendly and attentive.