Dubbed “Squishy Circuits” by University of St. Thomas by undergraduates Samuel Johnson and AnnMarie Thomas, the recipes on their project page teach you how to make both insulating and conductive dough that can be used to complete a circuit. Check out the a video demo after the break.
play doh
I seem to recall making a batch of homemade Play-Doh when I was a kid (based on something I saw on Mr. Rogers I believe), but even Mr. Rogers wasn’t a big enough nerd to make conductive Play-Doh.

What makes having Play Doh acceptable for an adult? Merely having a couple Star Wars toppers for the cans. Anything that gives you Obi Wan Kenobi in action with a light saber and R2-D2 actually taking flight has to go a long way towards legitimizing your preferred toys.
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