Presently I am not quite sure why so many people call them Galaxy jars, other than our proceeded with Star Wars enthusiasm, of course. When finished, they really look more like a Nebula to me. Either way, they’re such a lot of fun. If you are on a science kick, you can also attempt this universe container which glows! I don’t care for sparkle jars. Said, nobody. Ever. You can get the instructions to make this Nebula Jar beneath! You will require a cup for each color. Fill half with water and put around 3-4 squirts of paint in each. Blend until the color appears. Pour it on top of the cotton balls. Proceed with this process layer by layer with different colors! Kids can analyze what happens when you use more or less cotton balls on each layer.