How old is dd ? Mine is 2.2 and we've recently started going and she loves it. We went to a similar thing when she was much younger and it was a bit of waste of time though.
How involved are you with the toddler groups ? I was discussing the lack of singing with one of the other mums at ours a while ago and ended up sort of running one with her at the end of the session (I use the word "running" very loosely - everyone joins in etc. and it really doesn't take much organising)
I did just check for Jabber Jacks classes, but it turns out the one local to me is on one of my working days . It appears from looking at loads of class timetables that I am the only mother in the North-West who goes into the office on a Friday. Ho-hum.
And re the toddler group - our group leadership is a bit quichey. I think any suggestions of variation to the usual formula would go down like a lead balloon .