Turn Your Monitor into an Interactive Whiteboard…
Interactive whiteboards are useful for many reasons. Recently I came by a video suggestion that using a Nintendo Wii Remote you can experience interacting your monitor with a pen. The accessories you need for this project is an infrared pen (make one yourself!), a Wii Remote (stabilized somewhere against your monitor e.g. using an extra tripod), and a Bluetooth connection to your computer.
Here’s another video to make an infrared pen if you wish.