How about a banana space key?
Check out this awesome video where you can make a keyboard out of anything – yep, that’s right just about anything. A playdoh joystick controller for Mario Bros? Yep, with makeymakey it’s a real option.
It’s amazing what simple technology can do, and what you can do with simple technology is almost endless. The video outlines just a few of the options but I bet you can come up with far more. Check out makeymakey.com made by MIT grad students and see how you can make your own banana space key.