Two grown-ups claim to be experts on a topic and one of them is lying. It'll be up to our kid contestant to try and figure out which one is telling "the big fib."Two grown-ups claim to be experts on a topic and one of them is lying. It'll be up to our kid contestant to try and figure out which one is telling "the big fib."Two grown-ups claim to be experts on a topic and one of them is lying. It'll be up to our kid contestant to try and figure out which one is telling "the big fib."