Imagine having your friends and family over to play this life size Jenga game! This is probably the most fun project on this list and it really does look simple to make. Jenga after all, is merely a game of wooden boards that you strategically place and replace until someone wins, right? You can do that with your 2X4s and really cause some excitement at your next gathering. This is a great idea for those summer evenings when you want something fun and exciting to do in the backyard.