This summer we've slowly been building a self supporting tree fort for the girls. We've been using recycled wood left over from various builds we've had as well as standing dead trees from our land. The girls love it and will have another extension on it sometime this fall.
There's a ladder going up at the back of the fort.
When the girls need a break from the sun, they play in the sandbox underneath the fort. Abby is standing on tree stumps we used to border the sandbox.