We found the recipe via pinterest at http://www.homeschooling-ideas.com/how-to-make-clay.html#airhardening
- 2 cups baking soda
1 cup cornstarch (cornflour)
1.5 cups cold water
(makes about 2 pounds - the recipe can be halved).
Baking soda and cornstarch make a smooth, pliable play clay that can be colored with everyday food coloring - or left white and painted once it hardens. When you have made your model, leave it to air dry - turning every 12 hours or so.
Place ingredients in a pan and stir until smooth. Set the pan over a medium heat and stir until boiling. Stir out any lumps and cook until it is the consistency of mashed potatoes.
Turn out onto a plate and cover with a damp, well-wrung kitchen towel - let cool. Dust a work surface with cornstarch and knead until pliable
Some Tips From our experience!
- Make early in the morning! It takes a while to cool down!
- Takes more than 24 hours to dry so do not plan on painting the next day!
- When turning every 12 hours be CAREFUL! Very fragile and cracks easy!
- Don't forget to have your kids sign the bottom before drying!