Acids, such as vinegar, react and dissolve calcium carbonate, which is found in eggshells, to produce carbon dioxide gas and dissolved salt; a protein membrane around the egg remains, creating a springy feel. TV crafter Jim "Figgy" Noonan shares his educational how-to.
Budding chemists aren't the only ones who will get a kick out of this enjoyable experiment that teaches something about how the natural world works. When baking soda and vinegar come into contact, they form carbon dioxide. This gas fills the bottle and can't escape, so it rushes into the balloon, causing it to inflate.
Stitching a few school supplies and stylish acces¬sories is a cinch when you use wool felt because the edges won't fray. And since this doesn't require a lot of fabric, it's perfect for using up scraps and stray buttons.
Blowing the perfect bubble depends on equal parts science and magic. With a few twists of wire, you can make fantastic bubble wands and spend long, lazy days practicing your technique. The best bubble solution is 10 cups water to 4 cups dish-washing liquid, plus 1 cup Karo corn syrup.