The birthday is not for a month, but it is for a little girl that is getting into "creepy stuff" (whatever that is, my girls were very girly). Anyhow, she will be 9 years old in June and told her mom that she wants a creepy cake for her birthday.
The whimsical bakehouse has some cupcakes that have chocolate transfers that are worms, ladybugs, fireflies, etc. They are very cute. But I bet you could find picture of bugs that are more "creepy" and you could put them on almost any type of cake.