5 sm. pkgs. Jello
Sour cream

Choose colors and flavors of Jello as desired. Use colors that will make a rainbow (grape, lime, lemon, orange, cherry or strawberry). For each color, dissolve Jello in 1 cup boiling water (I use just over 1 cup). Divide in half.

To one half, add 2 tablespoons cold water. Pour into 9x13 inch glass pan and refrigerate 1/2 hour. To the second half, add 1/3 cup sour cream and keep at room temperature. When clear Jello is set, carefully pour sour cream mixture over it and refrigerate 1/2 hour. Repeat for each color. Cover with Cool Whip.