L.C.
Personally, I think they are a waste of money at this young age.
I have three kids and I did Little Gym with my first two girls but with my 3rd child, a boy, I decided to do the same type things with him but without spending a whole lot of money. He's a very active little boy. I've joined meetup.com and met up with many moms who have children the same age and we meet at the park, open gym/indoor playgrounds, and at each other's homes.
I also work out at the gym 3 times a week and my son goes in the great childcare they have there for an hour.
If this is your first child I'd say try it out for awhile. It definitely is fun and you could meet some nice other moms and your child will get something out of it. But, I think you'll see you can find other things to do with your money.