C.P.
I say now is a good time to start! I wanted to start with my girl because she is in daycare 8-5 Mon-Fri and I wanted something fun for us to do together (especially when it was too cold to be outside). I tried Gymboree & The Little Gym--both were fun, but WAY too expensive. Then I found a local group "Bounce n' Boogie" that has Saturday classes! She's 15 months old and LOVES going! We also started going to signing classes (better late than never) which I love because she's not a big talker yet and actually does use signs! Shop around, ask for a "free trial" class, and eventually you will find something you both love. Good luck!