If you have a little extra time and have a few sheets of paper and other school supplies, try to make something different. Like, maybe a paper bereta or paper gun.
If you need help, the video tutorial above will help describe and show you step-by-step on how to make this pretty cool looking paper gun from scratch. It's not too difficult to make and doesn't fire, but is pretty cool to show to your friends. So good luck, watch out for paper cuts, and enjoy!