Dyed Rice=hours of fun... and a kid-free potty break for momma :)
Here's how to do it:
Combine in a LARGE ziplock bag and smoosh around until all the rice is dyed-
2 TBS Food Coloring
3 TBS Rubbing Alcohol
4-6 Cups White Rice (I used more and it still turned out great)
Then allow to dry in the sun, or in a place where no one will bother it until it's dry. That is unless you just enjoy having your children, and their clothing/hair/shoes/your new couch/carpet, etc, dyed various colors... I'd advise you keep it away from little hands.
Once it's dry, place it in a tote with lid so that it can be easily transported to stay out of the elements. I'm guessing that soggy, wet rice wouldn't be as fun to clean up.