Anyway, I was web-surfing the other day and found this "blog" http://www.funathomewithkids.com/
The author there has many fun and interesting ideas/experiments etc. I browsed through and opened a dozen tabs of things that looked interesting and/or doable.
And THEN, I - I don't do crafts - me, did something!!! I had a package of Navy beans (which are white, by the way) and food coloring, so we did colored beans. It's very simple. 1 cup of beans, 15 drops food coloring, shake for 20 seconds (in a baggie or storage container); leave to dry on paper towel. That's it.
The children thought it was VERY interesting that I would do such a thing. They have had fun playing with the beans every day since.