This was a science experiment. I will say that are class did not have any science equipment so we had to do very easy stuff.
All you need to make it is milk, dish soap and food dye. Poor the milk in a pie plate or something that has a big opening. Then add any color of food dye in to it. After that put a very small amount of dish soap in it and it will look like this. Here are some Youtube video's of it. [link]