They're really fun. I went to a 2 year old girl's birthday. Gymboree has play equipment for kids from 6 months to 5 years. If all the kids at the party will be around the age of 1, then the Gymboree folks will arrange it for that age. At our local gy...
What I know is that the rules have been changed recently, and all matches will be 3 sets exept for men's Grand Slams (5 sets). So now the masters series final should be only 3 sets.
i agree with the 1st answer. this site might help