I mixed baking soda, dish soap, kool-aid and very little water together to make our paint. You can make it with corn starch instead of dish soap, but I found it to harden up if it sat for a period of time.
I didn't measure the amounts just placed baking soda, dish soap and water in a bowl. Then when I placed the mixture in the muffin pan I added the kool-aid.
Then place vinegar in a spray bottle and after the kids paint the sidewalk a little give them the spray bottle to make the paint fizz.
This is a super fun and inexpensive outside activity to do with the kids on a nice day.
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