-I know this is going to sound extrememly silly, but me and my daughter have "dance time" everyday. I throw in a Barney song dvd, and we act silly as can be for the whole time its on. Trust me, its great exercise, as I'm usually dripping in sweat by the time its done!
-If its weather permitting, go on a nature walk with your little one. If she's too little to walk, but her in her stroller and go jogging.
-If you google "mom and baby exercise tapes" you will get tons of results, and might find a tape that would work for you. They don't cost much at all, and many can be returned if they just don't work for you.
-Get some veggies and dip. Snack on those. Dry cereal is a great snack. Personally, I eat better now because I find myself only wanting to eat what my daughter does. Not sure how old yours is, but now that my daughter is 19 months old, she sure pays attention to what I'm eating. I cannot bring myself to feed her something off my plate thats unhealthy.
Also realize that for some women, the weight doesn't just drop off. It takes time. I dropped my pregnancy weight off quick, but it seemed to sneak back up on me.

I finally reached my goal (post partum) a month ago. Its a good feeling, and once you lose a few pounds, the momentum you gather from that will keep you going.
Good luck!