Marvelous CalliopeEquipment 4
Source Pathfinder #152: Legacy of the Lost God
Price 100 gp
Weight light
This large slide whistle appears to be made of fine brass, the sides of which are engraved with musical notes and dancing clowns.
Activate 1 minute (command, envision, Interact)
Effect You blow a tune upon the slide whistle, causing the whistle to expand. The whistle sprouts from one into several, and then creates a large wooden frame and keyboard. By the time the unfolding is complete, the whistle fully transforms into a calliope, a wagon-sized contraption consisting of several steam whistles played like an organ. The calliope is heavy and anchored in place.
You have a +1 item bonus to Performance checks to play the calliope. The calliope has a tendency to produce music for a few seconds after you cease playing it, adding a jaunty and overlong conclusion to your music.
If you use an Interact action to pull the small metal ring on the underside of the marvelous calliope, the calliope collapses back down into a slide whistle.
Activate 
Interact
Frequency once per hour
Effect You play the calliope, causing it to cast Charm on one of the listeners.
Traits
Something of uncommon rarity requires special training or comes from a particular culture or part of the world. Some character choices give access to uncommon options, and the GM can choose to allow access for anyone. Less is known about uncommon creatures than common creatures. They typically can't be summoned. The DC of Recall Knowledge checks related to these creature is increased by 2.
ConjurationEffects and magic items with this trait are associated with the conjuration school of magic, typically involving summoning, creation, teleportation, or moving things from place to place.
MagicalSomething with the magical trait is imbued with magical energies not tied to a specific tradition of magic. A magical item radiates a magic aura infused with its dominant school of magic. Some items or effects are closely tied to a particular tradition of magic. In these cases, the item has the arcane, divine, occult, or primal trait instead of the magical trait. Any of these traits indicate that the item is magical.
StructureAn item with the structure trait creates a magical building or other structure when activated. The item must be activated on a plot of land free of other structures. The structure adapts to the natural terrain, adopting the structural requirements for being built there. The structure adjusts around small features such as ponds or spires of rock, but it can't be created on water or other nonsolid surfaces. If activated on snow, sand dunes, or other soft surfaces with a solid surface underneath, the structure's foundation (if any) reaches the solid ground. If an item with this trait is activated on a solid but unstable surface, such as a swamp or an area plagued by tremors, roll a @Check[type:flat|dc:3] each day; on a failure, the structure begins to sink or collapse. The structure doesn't harm creatures within the area when it appears, and it can't be created within a crowd or in a densely populated area. Any creature inadvertently caught inside the structure when the item is activated ends up unharmed inside the complete structure and always has a clear path of escape. A creature inside the structure when the activation ends isn't harmed, and it lands harmlessly on the ground if it was on an upper level of the structure.