I guess you do this with forks and a rubber hammer. Might be therapeutic anyway.
Amazing Backyard Treehouse (and how it was built)
Cool DIY Backyard Projects To Surprise Kids
Clear roof, tiny house
Take your playset to the next level with a handy bucket pulley system.
Amazing treehouse - fitting for both kids and adults!
Simple Pulley and Lever Activity for Children | Parenting Fun Every DayParenting Fun Every Day
The page no longer exists, but this would still be a fun backyard project! Forest Story House More
Unwind in your backyard with this cozy DIY outdoor cabana lounge!