Here's the recipe we used:
1 cup all-purpose flour
1 cup water
1/2 cup salt
1 teaspoon vegetable oil
1/2 teaspoon cream of tartar
Food coloring (we use cake decorating pastes)
Mix the flour, water, salt, oil, and cream of tartar in a saucepan. Cook over medium heat until it holds together (keep mixing or it will stick to the bottom of the pan). When the clay is cool enough to touch, knead it on a floured surface and add food coloring. Store in an airtight container. We tripled this recipe which made more than enough for three eager kids.
With many of my kid's projects I remind myself that it's the process not the end product that is important and makes the little wheels in their mind spin and their creativity grow.
Play clay is all about the process--the squishing, bending and manipulating. Then there's the ease of crumbling it all up and starting over again.
A batch or three of play clay easily consumed over two hours of art time--which means no computer, tv or video games. Ahhhhh...tell me that's not worth every grain of salt!