Polly Pocket Original Sets: The $1,000 Micro Playsets
Those colorful plastic compacts from the early 90s hid entire miniature wonderlands inside. Bluebird Toys created these pocket-sized marvels before Mattel bought the brand and changed the design. The dolls measured barely a quarter-inch tall, making them incredibly easy to lose. Serious collectors now hunt specifically for pre-Mattel compacts with all pieces intact. The most valuable sets still click open smoothly on their original hinges.
