When I babysit my cousins i'm always looking for stuff for them to do. I found the recipe here. All you need is:
1 1/2 cups of rice
2 tbsp of vinegar
and some generous drops of food coloring
The website said to use bowls to mix the rice but i used ziplock bags. Less mess and i could give them to my cousins and my nephew to mix.
Mix well until the color has coated the rice. Make sure you don't get too crazy with the rice shaking because it will explode. Our purple exploded :/
Then spread parchment paper on cookie sheets and put the rice in the oven at 175 Degrees F. for 10 minutes at a time. I ended up doing 20 minutes.
I had the boys pour the rice on the sheets and I spread it out with my hands and It did die my hands but it washed off.
We did 6 colors (from left to right) Green, Blue, Red, Orange, Yellow, and Purple is in the very back and its really dark. :)
The boys and I really enjoyed making it! but I really dont know what to do with it afterward... I put mine in a jar like rainbow.



