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Careful: Food colouring can stain.
Squish, squeeze and sculpt
Once your dough is smooth, it’s time to play! Have fun squishing, squeezing and sculpting your dough. When you’re done, store your dough in an airtight container in the fridge to keep it fresh for next time you’d like to play. The dough should stay fresh for about 2–3 months in the fridge. If you notice any strange smell or spots on your dough, it’s time to toss it and make a new batch!
Experiment with your play dough! Here are a few ideas to try out:
How does it work?
Making play dough is an example of chemistry in everyday life. While making your dough, you created a mixture, solution and chemical reaction.
A mixture is a combination of ingredients that can’t be easily separated from each other. When you combined your dry ingredients of salt, flour and cream of tartar, you formed a mixture. No chemical reaction occurred, meaning none of the ingredients changed. However, it would have been almost impossible to separate them.
In a solution, the molecules of the different ingredients combine completely. By combining water and food
colouring, you formed a solution. When you added oil during this step, did you notice that it made little puddles on the surface of the water? Oil and water are immiscible, which means they don’t mix easily. Because oil is less dense than water, it floats on top.
A chemical reaction occurs when a new substance forms. You created a chemical reaction when you combined all of your ingredients together. Many chemical changes happened before your eyes, though you couldn’t see any of them: