Fartosaurus Rex is a smorgasbord of scatological humor. Aimed at the Captain Underpants set, the show is packed with puppets, poop jokes, and a big green Tyrannosaurus. A quick 35 minutes long, this is a good choice for “first Fringe show.” Don’t overthink it. (Vegetarian Diets led to global warming and the mass extinction of dinosaurs? Really?) Just enjoy the performance of Fartosaurus Rex himself, and the best Fringe mascot cameo ever.