Make a bubbling, frothy brew this Halloween that is not only fun, but teaches kids some science too! All you need to get started is a glass jar or cup, vinegar, food coloring, dish soap, glitter (optional), baking soda, and a cookie sheet or baking pan to act as a drip tray. First, fill up the glass cup about halfway with vinegar and place on the tray. Add food coloring of your choice and a dash or two of the dish soap to the vinegar. Give it a quick stir to mix. Add some glitter to the mixture if desired. Take a heaping tablespoon of the baking soda, and dump it into the glass jar. Immediately a chemical reaction begins to take place between the baking soda and the vinegar. Frothy bubbles form as carbon dioxide is created during the reaction. The dish soap helps to amplify the frothiness. Within a minute, the mixture overflows the jar and leaks into the pan. You've just created a spooktacular Halloween brew!