When you are bored, you can play video games, watch television, wash the dishes at home and prepare something to eat in the kitchen. You can also take a walk in the backyard or in the neighborhood. Check out http://www.bored.com/boredthings/ for more ideas.
It sounds like you want to learn how to build things. That is a great hobby. My dad was a woodworker and he made some beautiful things that I have in my house. You can start by going to the library and getting books on how to get started on some project you want to try. Maybe even take a class. It is a rewarding experience to make something yourself! Just take the 1st step!