Tornado in a Jar Experiment 🌪 ages 3-8 🌪 for this super cool experiment you need a round glass jar that seals tightly, water, dish soap and glitter (optional). Fill the jar about 3/4 full of water, add a few drops of dish soap and some glitter. Seal the jar, shake and watch the tornado form. We had to try a couple different dish soaps as the first one we tried didn’t work.