Building a treehouse with my boys and it's actually happening

We've been planning this for months and finally got started last weekend. Got the main platform done and the boys helped me with the railings. One of them said 'dad this is the coolest thing we've ever made' and I just about lost it trying not to cry. Plan is to have it done in 3-4 more weekends. Can't wait to see their faces when they sleep in it for the first time.