This would be cute over a sandbox or a kiddy pool, too. A couple of chairs, some wind chimes, a drop cloth and some garden boxes provides an outside place for toddlers to renew and refresh at Sunshine House 15 in Mauldin, SC.
A compact swing set for the backyard. Could also attach tree chairs!
A teenager treehouse, where they can come out and relax on a summer evening.
From Drab to Fab: A Playhouse Renovation You've Got To See — Momma Society