Chirp and his friends Squawk and Tweet love going on adventures together. Today, they've traded in their playhouse for a boat, and they're paddling down a mighty river in search of the world's biggest waterfall When their boat springs a leak in the rushing rapids, the three explorers must find a way to plug the hole. And -- KSSHHH -- what is that thundering sound they hear off in the distance? Find out if Chirp, Squawk, and Tweet go...