H.T.
I am a mothr of 6 (15,9,8,7,4,and 1 and a half). My little ones favorite things to do outside are ride their bikes/sit and scoots, go for a walk in a wagon, push around big tonka trucks, and draw with sidewalk chalk. If you are looking for a really different idea my mom gets the kids a family pass to the zoo for christmas and gets my neices who are a little older a family pass to the pool. Both give you something to go do all summer and all you need is the time and gas to get there.