Did you know? You can make pencil drawings reactive to touch for use with your projects! It's really easy, and gives you a lot of flexibility in making interfaces for whatever microcontroller project you're making.
I put this together as part of my UnoJoy project, where we're using the Arduino as a platform from which to explore how we interact with video games. You can check out more of our projects for UnoJoy at unojoy.tumblr.com, or more of our other projects at the Exertion Games Lab.
Step 1: Materials
You'll need the following:
A pencil - the softer the lead, the better
Some 1+Megaohm resistors
Paperclips - make sure they're bare metal, not coated in plastic
Clear tape (optional)