The Celebration Castle is a huge playset where all your ponies can go. Some of the accessories came in alternate colors.
Celebration Castle Story
Pink Sunsparkle is the youngest and tiniest pony in Ponyville. The other ponies are like big sisters to her, and she always wants to follow them on their adventures. She’d never run too far from the Celebration Castle, though, because this is where all the ponies gather to play and plan exciting parties!