This is a treehouse that my dad and I built in about 5-6 days by ourselves.
What makes this treehouse awesome:
It has a rope swing for climbing up and down the treehouse
A secret plank that lifts up to reveal a hidden compartment
Eventually, the treehouse will have railings, a firepole, a zipline and half of it will be covered with a roof-type structure.
One of the tools we used to build this treehouse was our Craftsman 10" Miter saw-without which, this project would have been impossible.