A deck means more space to play. Shutterstock

A New Deck

While this may seem a little more in-depth than the previous example, a deck could still raise the level and fun of your treehouse. Building a deck helps with the imagination play: suddenly, the children are transported to a pirate ship or the top of a mountain. This feature may also lure mom and dad up into the heights: adding a deck could provide space to relax and unwind. While it may seem daunting, a deck is not all too difficult to assemble: buy the material, establish a platform, and go from there!