What toy fad of the late 1990s and early 2000s was a motorized hamster-like toy that ran through tubes?

The toy fad you're recalling, featuring motorized hamster-like toys that navigated through tubes, accurately describes Zhu Zhu Pets. These adorable plush robotic hamsters, created by Cepia LLC, first launched in July 2009 and quickly became a massive holiday craze that year. While the prompt mentions the late 1990s and early 2000s, Zhu Zhu Pets specifically captivated children and parents in the late 2000s, becoming one of the most sought-after toys during the 2009 Christmas season.

Each Zhu Zhu Pet, with names like Mr. Squiggles, PipSqueak, and Num Nums, was equipped with a motor that allowed it to scurry and zoom around. They featured multiple play modes, including a "nurturing mode" where they would coo and purr, and an "adventure mode" where they explored their environment. A key aspect of their appeal was the extensive range of accessories available, most notably the customizable habitats that included various tunnels and wheels, allowing the hamsters to mimic the playful movements of real pets without the actual upkeep.

The popularity of Zhu Zhu Pets was immense, leading to widespread shortages and even inflated prices on secondary markets. They offered a charming alternative to live hamsters, providing "all the love without the mess," a clever marketing point that resonated with many families. The toy's success was a testament to its engaging design and the simple joy of watching these little robotic creatures navigate their intricate plastic worlds.