I just got this Makey Makey kit (which, by the way, is on sale at the link provided, at this moment).
A Makey Makey is a device that allows a do-it-yourselfer to create a closed loop electrical signal, that the Makey Makey device converts into a specific serial signal that is sent via USB to a computer. The signal is a keystroke or mouse event. So, you can hook the Makey Makey to, say, a banana and a laptop, then when you touch the banana the laptop gets a mouse button click or a space bar or something. The kit is designed to give easy access to the key signals most used in gaming, but I think it allows the full range of keystrokes, and it can also interface as a sensor to an Arduino or similar, so you can use a banana to control, say, your robot. Or whatever.
I’ve not used it yet, so this is not a review, just a note that I’ve got one. Do you have one? This should be fun.
OK, off to get the bananas.