ALTOONA, Pa. (WTAJ) — In this episode of Science with Shields, Christy Shields shows you how to make fireworks in a glass. Fill your glass or vase with warm water. In the bowl, put a thin layer of oil and then add a few drops of different food coloring. Mix the oil and food coloring. Now pour the oil and food coloring into the container filled with water. Watch how the colors start to burst in the water!