4 different colors of jello
Mix the first color with 1 cup of boiling water. Divide in half. Add enough ice to make one cup (Side note: I make my jello right in the glass measuring cup so that I can see when it gets up to one cup, I think it's easier that way). Stir until the ice melts. Put in a 8x10 pan (or in this case divide between 6 goblets). Put it in the refrigerator for at least 30 minutes or until it gets hard (A good test is to touch it with your finger, if it doesn't stick it is ready). After it hardens, take the other half of the jello and add 1/2 cup of sour cream (whipped cream can also be substituted but it doesn't set up very well). Pour over the first layer. Let it harden (about 30 minutes) and then repeat.
Easy, huh? It takes a "few" hours so make sure you're going to be home all day!