All of us have seen the toys with an ocean “trapped” inside, and when you move it, the ocean moves itself an creates nice waves. In this video you can learn how to make a homemade one.

The science behind this experiment is simple. Water and oil can’t mix and if you put a little blue food colouring you have created your special piece of ocean. Maybe put there some plastic fishes and a boat and it is perfect.

I guess you can sell this kind of toys, of course if you make them look better .