What is at the end of rainbow?

I found these 2 buckets at Michaels last year(75% off) and the 2 different colored coins as well. My preschoolers find the coins in the rainbow colored rice and sort them between the 2 buckets using tongs. They can also count the coins too!

You Need:
2 cups rice
1 tsp rubbing alcohol(this makes it dry fast and not sticky)
5 drops food coloring

To Make:
Mix it together and let it dry on newspaper. Repeat for as many colors as you like. HINT: Once dry the colors don't rub off on anything