I found this cute idea for apple "cupcakes" on a blog called Chasing Cheerios. The author made these cupcake-alternatives for a niece's birthday party.
Instead of using cake, you slice apples in half horizontally. Next, you spread a topping such as sugared cream cheese or peanut butter on top. Last, you can decorate with sprinkles, chocolate chips, or whatever. I love apples! Great idea!