Primary school pupils like sweets very much. But what are the sweets made of, what are they?
Children tried to find out that with very known sweets - "M&Ms". We pour the glass with water and put there a handful of these sweets. The water  in the glass  immediately turned to the rainbow, and after a few minutes the letters from the sweets appeared on the surface. So, the children decided that maybe it is  better not to eat paints and these letters, which nobody  knows what they are made of.