We're bringing these to the school for the kids to decorate for Christmas. If you want to make colored clay just add food coloring to the water before you mix it with the cornstarch and baking soda. The clay can be sealed in an airtight container and kept in the fridge for a couple of weeks. Just bring it to room temperature before you use it. This recipe can also be doubled to make a larger batch of decorations.
Clay Christmas Decorations
1/2 cup cornstarch
1 cup baking soda
3/4 cup water
Making Clay
In a medium sized pot combine the cornstarch, baking soda, and water. With an adults help the kids can stir this mixture over medium-low heat. After a couple of minutes, the mixture will begin to thicken. When it looks like smooth, mashed potatoes, remove the pot from the heat. Spoon the ball of dough into a bowl and cover it with a damp cloth until it's cool. When it's cool, knead it on a smooth surface, adding a little more cornstarch if it feels sticky.
Rolling, cutting, and baking
Preheat oven to 175 degrees. Line baking sheet with parchment paper. Roll out clay to 1/4 inch thick on a surface lightly dusted with cornstarch. Use cookie cutters to cut out shapes. Transfer shapes to the prepared baking sheet. Use a straw to poke a hole in the center top of each decoration, then get the kids to blow out the small piece of clay. They love this task! Place them in the oven at 175 degrees for about an hour, turning them over halfway through cooking.
Paint or decorate them and thread a piece of ribbon, twine or yarn through the holes.