Ages 4-8. Page Street Kids.

"In the fort in the woods, a prince is preparing his castle for a lively feast for the royal kingdom. Unbeknownst to him, a pirate uses the same fort as her ship, planning to venture out to the open seas in search of treasure. But when a treasure map appears on the prince's party invitations, and the pirate finds that her sword has turned into a scepter, they realize there is an intruder in the castle--no, ship! Soon, a battle over the fort between the adversaries ensues, leading to a humorous showdown. When they make amends, their amazing imaginations come up with a new adventure together." -- Amazon.com.