Hi, for all those people out there who want to know if the water marbles youtube video is fact or fiction I think I found a way to prove that water marbles are fake. First of all I went to my science teachers room today and I started to talk with her about water marbles and then she pulled out a tube which contained little blue beads. She told me to bring some home and put them in water and see what would happen. Well I did and after studying the beads for about one hour I found that they soaked up the water and grew to about two centimeters around, and they looked just like the marbles in the video. The water turned light blue, but in the video its purple which makes me think he had the same set but a different color. I have attached some pictures of what the marbles look like. If their are any questions please ask.