Recyled items that have been made into a tree house. If he's anything like me, He'll love it....
Ideas for Roland
Pallet tree house
Look at how there does not appear to be any knee braces. This appears to be resting on the two longitudinal 2x6s. The ladder may also provide support.
The Pallet Project: Tree Hut - I would love one of these in my garden
How to build a tree house
My big boys
Wooden Pallet Playhouse DIY
Lexie would like
pallet tree house
Pallet Sectional Patio Set | 101 Pallet Ideas
Things to make from pallets
A pallet pirate ship - with the weather getting muddier, this type of outdoor play is always in season.