I am a member of my local YMCA. They have a childcare, that is more like a playground for the kids and they LOVE IT. I can bring all 5 of my little ones and they have different rooms for the different ages (birth to 1 year room, 1-3 year old room, 3-5 year old room...up to age 12) and I can spend 2 hours working out or doing anything in the Y that I want...it rocks...and I go 5 days a week
If you find something that your kids enjoy doing too, it helps