You don't have to be a geologist to appreciate the wonder of this exploding volcano.
Arrange the cakes and cupcake as shown, using frosting to secure them in place. Trim the top dome cake as shown, then cover the cakes with the icing. Just before serving, drop a cloud of whipped topping around the crown of the cake and add Lollipop Lava.
Lollipop Lava: In a heavy saucepan, bring the sugar, syrup, and water to a boil (parents only). Continue boiling until the mixture reaches 295 degrees on a candy thermometer.
Remove the mixture from the heat and stir in the food coloring until the desired shade is reached. (Tip: If you don't have a candy thermometer, melt crushed lollipops or hard candy in a saucepan over medium low heat.)
Allow the liquid to cool one to two minutes before pouring it in randomly shaped spews and puddles onto a foil-covered cookie sheet. Let the lava cool completely before removing from the foil.