BRAIN MOLD (I got mine at American Science and Surplus in Chicago, Illinois.)
6 small or 3 large boxes of watermelon (works best) or peach Jell-o
1 can light or non-fat evaporated milk*
2 1/2 cups boiling water
1 cup cold water
Green food color
Spray inside of the mold with a non-flavored cooking spray (like Pam).
Dissolve Jell-o in 2 1/2 cups of boiling water. Add 1 cup cold water and evaporated milk. Add food color to desired color (about 5 drops). Pour in mold and chill until set.
To remove the brain, shake the mold gently until the gelatin loosens. Place a flat plate upside down over the open side of the mold, then flip the mold and the plate together. Lift the mold off, leaving the brain on the plate.
*Don't use regular milk in place of the non-fat evaporated milk - it's won't be as cloudy and has a tendency to curdle or separate in this type of recipe. Don't use whole evaporated milk, either, since it may also curdle.
About 15 drops each of red, green, and blue will make a realistic brain color of gray.
Use blueberry Jell-o, adding red and green food coloring to get the color you want.