I have 7 months old baby and thinking to take him to playgroup. When is the best age to take a child to activity place?

My Gym accepts infants from as young as 3 months old. Since your child is already 7 months, he should be able to interact more with babies his age and enjoy the class more than a 3 month old. There are exercises, songs and baby rides and adventures. Other than baby gyms, there are music and movement classes, baby signing classes and baby swimming lessons! http://sg.theasianparent.com/classes-for-babies-in-singapore/