S.G.
Hi A.:
I see that your in Hudson, I am in Land O'Lakes. No 17 months isn't to young for either of those activities, you may have a hard time finding a dancing class though at that age. I do know that Suncoast Gymnastics on Congress has "Open Play" basically it is an hour that the little ones run around the equipment with you and try stuff out. The lady who runs/owns the gym also does some circle time, some little obstacle courses and little starter gymnastics stuff if your child will participate, some don't, they just run around and jump on stuff the whole time. Some dancing places have Mommy and Me, the one I know of is Contempo, but that is in Land O'Lakes and a little far for you. Good Luck
S. Gallo
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