Harry is outside, playing in a mud puddle and getting really dirty. His Nana tells him it's time to take a bath, but he says he doesn't like baths because the soap gets in his eyes. Nana recommends a solution for this, but Harry decides he still doesn't want to take a bath and makes a break for it. He and the dinosaurs go to Dino World, where Harry decides to do his best to become the dirtiest, stinkest boy ever. The dinosaurs recommend he play in primordial ooze, but it isn't nearly stinky enough for him. He and the dinosaurs go on a safari through the stinkiest areas of Dino World, but when Harry wants to visit Stinky Swamp, the dinosaurs bail out. Then, Harry meets someone at Stinky Swamp who begins to change his opinion.