Life among the cavefolk isnt easy. Everything they do is gross, from eating raw meat to skipping showers. Thirteen year-old Frank, lost in their strange world and cut off easy pizza and other modern conveniences, tries to invent fire, but his good intentions might just blow up in his face. For one, smoke inhalation can be deadly. Whod have thunk proper ventilation was so vital to cave living? Then theres that rival clan, plotting to develop a firearm Throw in a tribe of bloodthirsty bunnies that kill with cuteness, and youve got another zany, zippy adventure in prehistoric times.