I should probably address this here.
Mix a few drops of food coloring, (you really don’t want to use too much since it needs to dry and stick onto the rice, not stay wet and rub off on your hands,) with a couple of teaspons of rubbing alcohol in a large ziploc bag.
Take a couple of cups of dry UNCOOKED white rice and toss it into the bag with the food coloring mixture.
Shake the bag up (the kids like doing this, just make sure they don’t puncture the bag, unless you want food coloring everywhere)
Pour the rice out onto a tinfoil lined baking pan and let it dry. Plan for it to take half a day to dry. Of course this varies based on the tempertaure and humifity in your house.
After it dries I mix in a couple of more cups of white rice to have color variation. To be honest I think this initially happened because I didn’t have enough colored rice to fill the plastic tub and didn’t want to make more. But it works.
Store in an tupperware.
Even though it seems like it might be a pain to make, it lasts forever. I still have the same batch I made at least five years ago.