This is a 1 day MS Excel lab for a computer or math class. You can have the students explore the distribution of different color Skittles in class.
Tell them they can't eat till the end of class, or they will distort their numbers.
This file has a worksheet and a excel template you can use to produce the class graph.
I went to a bulk store and purchase a large 5 lb bag of skittles for this lab.