If there are two things Nickelodeon's game shows are known for -- dating back to the '80s -- it's physical challenges and slime. Those elements play important roles on "Webheads," along with a more modern element: viral videos. The show features kid contestants competing in challenges that test their knowledge of the videos, answering questions that include predicting outcomes of the clips, and guessing which are most popular among the show's studio audience. Add in physical challenges, slime, slemes (memes with slime) and "Big Time Rush" alum Carlos PenaVega as host, and you have a distinctly Nickelodeon game show.