Bouncing Balls
Today as a beautiful day and we went outside for a couple of experiments. The first one was bouncing balls. I found this recipe for them the other day on the internet.
These do not make the typical store bought balls that you get out of the little vending machines at the grocery store, but it was fun to make them ourselves. The balls will dry out in a couple of days, so this is a project that if fun to do again and again.
What you will need:
2 Tablespoons warm water
1/2 teaspoon Borax (I found it in the laundry aisle at the store)
1 Tablespoon school glue (the recipe says that using white glue will give you an opaque ball and using clear glue will give you a translucent ball. That’s not accurate. We made them both ways and they were all opaque. Once you add cornstarch, it’s opaque so I’m not sure where they got their info)
Food coloring (optional)
2 paper cups
1 craft stick for stirring
Directions for making the ball:
Place 1/2 teaspoon of Borax and 2 Tablespoons of water into one of the paper cups. Stir to dissolve the Borax. Set aside.
Place 1 Tablespoon of glue into the second cup. Add a few drops of food coloring and stir.
Place 1 Tablespoon of cornstarch into the cup with the glue and food coloring.
Add 1/2 teaspoon of the Borax solution to the cup of glue and cornstarch. Wait 15 seconds before stirring so the ingredients have time to interact.
Stir until the mixture begins to stick together. Once the mixture is a globby mess, but stays in one piece, remove it from the cup and put it in your hands.
Start rolling and kneading the mixture. It will be quite sticky at first, but after you keep rolling it and kneading it, it will start to smooth out and become less sticky.
After a couple of minutes of rolling, it will form a smooth ball.
The ball is then ready to bounce. We found it bounces a bit higher on carpet than a hard surface.
Store the ball in a Ziploc bag to help prevent it from drying out too quickly. I’m not sure how long they will last, but they were fun for the afternoon.
Since we already had out cornstarch, water and food coloring, we used equal parts of cornstarch and water to make sidewalk paint. After adding a couple drops of food coloring and giving it a stir, it was ready to go. The mixture goes on wet and dries looking like chalk. After a bit, our sidewalk looked like some pop art.










































































