Again massive apologise for leaving you so long without a reply! I don't have any children myself but here is a link to a post natal exercise plan which might help http://www.ivillage.co.uk/pregnancyandbaby/parent/postnatal/articles/0,,262_163901,00.html

Davina McCall also has a workout DVD focusing on post natal exercise http://www.amazon.co.uk/Davina-Pre-Post-Natal-Workouts/dp/B000LRYTCC

I had a small bulgy tummy and I found exercising a few times a week (i have Davina Superbody Workout DVD), not eating puddings and stopping drinking alcohol helped me massively. You've got to be pretty hard core about it but it worked for me.

Alex