Nickelodeon - Gak (1990s)

Remember the satisfyingly squishy, colorful goo that came in that distinctive star-shaped container? Gak was the quintessential 90s sensory toy, a staple of Nickelodeon's messy brand identity. What made it truly special wasn't just its incredibly pliable, gooey texture, but the hilarious, rude noises it made when you jammed it back into its container – a sound that could instantly crack up any kid (and probably annoy any parent). It wasn't just a toy; it was a tactile experience, a way to gross out your friends, and a small piece of the vibrant, often slimy, world that Nickelodeon created for kids in that era. Its simple, messy fun made it a huge global fad, cementing its place in the memories of a generation.