I just found the coolest site! It’s called Howtoons, and it’s perfect for kids who like to build stuff. There are projects for a wide range of ages and all the instructions are in cartoon format! There are some really cool projects such as learning to make a soda bottle submarine, one man band, stilts, a Christmas snow globe, a pinwheel, and lots of others! They also have a blog, where you can find more interesting projects, many with video instructions, such as the water gun alarm clock!