The Squishy Circuits idea has been around for ages, with many a science teacher using regular play-doh as a condition medium.
This project is ideal for beginners of all ages. It is safe to play with, easy to make, and easy on the pocketbook.
There is currently one version of this kit.
Instructions on making the dough
1 cup Water
1 1/2 cups Flour
1/4 cup Salt
3 Tbsp. Cream of Tartar*
1 Tbsp. Vegetable Oil
*9 Tbsp. of Lemon Juice may be Substituted
Mix water, 1cup of flour, salt, cream of tartar, vegetable oil, and food coloring in a medium sized pot.
Cook over medium heat and stir continuously.
The mixture will begin to boil and start to get chunky.
Keep stirring the mixture until it forms a ball in the center of the pot.
Once a ball forms, place the ball on a lightly floured surface.
Slowly knead the remaining flour into the ball until you’ve reached a desired consistency.
Instructions for electronics
Make two snakes of dough and put them side by side, but not touching.
Run alligator clips from a power source (4AAs or a 9V) to the dough. Positive to one snake, and negative to the other. Again, the two snakes are not touching.
Spread the legs of an LED. Put one leg into each snake. If it doesn't light up, flip the LED around. (LED have a positive and a negative leg. If they're in the wrong snake they won't turn on.)
And thats about it.
About insulating dough
You can use a sugar based recipe to make a non conductive dough, or an insulating dough. We don't recommend it. We've never had great success making it and it molds over within 24 hours and is very sticky. If you want you can google search for it easily enough.