Keep your arms and kids in motion at the playground! The other day my daughter and a friend wanted to fly like fairies in the baby swings and needed someone to help them get air. Using my left arm to push my daughter and my right to push her friend, I got a rhythm going until about 20 minutes later when they finally tired of the activity. When we were leaving I noticed my arms were a bit sore and asked our in-house fitness guru, FitSugar about recommending it as a tip for moms who find themselves hanging out in the sandbox. She said it's a great exercise and to do squats if you want to add a lil more to your workout.