Rainbow Jello

Small boxes of jello:
lime
lemon
orange
cherry
strawberry
black cherry

2 cups sour cream

Dissolve lime jello in 1 1/2 cups water (heat in microwave until boiling).  Divide into two bowls.  Add 1/3 cup sour cream to one half and 3 Tablespoons cold water to the other half.  Pour jello into 9x13 pan and refrigerate until set.  Pour the other half over the set jello and refrigerate until set.  Continue with the remaining jello in the order listed above.  If you get the first few layer of jello set well and really cold, it is easier to add the remaining layers.  I usually have two flavors mixed and ready to be layered sitting on the counter.  If you work too far ahead the jello may set, even sitting on the counter.