Need help with a 90s game show?

Ok the only thing I remember about this game show is that there was a round (possibly the final round?) where one contestant of a pair would start at the bottom of a set of steps. On each step there was a challenge where the other contestant of the pair not on the steps would have to guess. I believe one of the steps was a pictionary-type challenge. I KNOW that one step was a "chubby bunny" where the contestant would have to put like 8 marshmallows in to their mouth and say a word that the other contestant had to guess. It was possibly on Nickelodeon, but I'm not sure. HELP!!