2.5 cups corn starch
1 cup water
Food coloring (optional)
Put the cornstarch in a mixing bowl or casserole pan. Your preference. I think the gak is easier to play with in a casserole pan but you might find it easier to mix it in a bowl and then pour it in the pan. I've done it both ways and either if fine. Do what works for you.
Anyhow, once you've got your cornstarch in a bowl or pan, slowly add the water and a few drops of food coloring while stirring as best your can. I use a combination of spoon and hands to mix it. It will feel weird. It will seem hard to mix. Like I said above, it's not quite a liquid and it's not quite a solid. It will look like a liquid that is easy to stir but it will feel like you're stirring something solid. Keep at it.
You may need to add a little more water or cornstarch to get the right consistency. You'll know it's the right consistency when you can run your finger through it and you see it break apart in solid looking pieces that immediately blend together like a liquid.
colloid. If you work quickly you can roll it into a ball. But if you stop moving and let it sit in your hand it will run down through your fingers like a liquid. (Disclaimer, I'm not a scientist. Sorry if that's not a very good explanation).
the tabletop beach even though it looks like it makes a much bigger mess. I would not recommend playing with it over carpet.
This post is part of Frugal Friday, and Frugal Days, Sustainable Ways.