I believe in order to get more kids outside get them something to make them want to get out there. A couple years ago I bought Chloe her first hammock and showed her how to hang it and she fell in love with it. She got in that hammock the first time on a camping trip grabbed her book and went to reading for hours. Since then she now hangs her hammock in the backyard to read. So past weekend I snapped this picture of her hanging and reading while camping. So find that thing that makes your kids want to get outside.
Mid Tn Outdoors 