1. Walk or jog with baby – About.com has a great article providing tips.
this article with work outs, including squats and lunges, alongside the baby stroller!
3. Pop in a DVD at home, like the Happy Baby Workout. “The Happy Baby Workout is a unique exercise training routine for Mom and Baby designed to benefit them both and strengthen their bond. Moms get to exercise, and the baby builds valuable coordination skills, develops his brain, and gets "tummy time" to build strength in his neck muscles.” Sounds like it is win / win!
4. Go to a class in your area like Baby Boot Camp. “Baby Boot Camp is an innovative stroller fitness program that helps moms regain or enhance pre-pregnancy fitness levels and meet the physical challenges of parenting by emphasizing strength training in a supportive environment.”
5. Do water aerobics at the pool, while baby is floating in a boat.