Mattel U.B. Funkeys Hidden Realm Starter Kit with software.

U.B. Funkeys was a line of interactive toys released by Mattel in the mid-2000s. These toys connected to a computer via a USB dongle, allowing children to unlock and play virtual games within the U.B. Funkeys virtual world. Each character figure, known as a "Funkey," would unlock different areas, characters, and activities within the game. The concept aimed to bridge physical play with digital interaction, encouraging exploration and customization within a virtual environment.

The "Starter Kit" typically included the necessary software and at least one Funkey figure to begin playing. This particular "Hidden Realm" starter kit suggests a specific theme or expansion pack within the U.B. Funkeys universe. The toys were designed for children aged 8 and up, offering a blend of collectible figures and engaging online gameplay that was popular during the era of early digital toy integration.