Also on these boards
Double Swing Set in Fun Outdoor Play Structures and Games for Kids from HGTV
Maybe not so easy to make but super super cute Rowboat Sandbox - Fun Outdoor Play Structures and Games for Kids on HGTV
YOUR KIDS PLAYHOUSE 1920's Barn Wood Sign Hand Painted Custom Personalized Clubhouse TreeHouse Childrens Kids Indoor Outdoor Decor. $20.00, via Etsy.