No case is too hard for Nickelodeon's Rusty Rivets! When the key to the city goes missing, everyone assumes Rusty's Botasaur buried it. But it's up to Rusty and Ruby to dig up the truth! Boys and girls ages 3 to 7 will love this Step 2 deluxe Step into Reading leveled reader. Meet Rusty, a ten-year-old designer and do-it-yourselfer who solves problems using ingenuity and wild, innovative inventions. With his best friend, Ruby, his robotic pet, Botasaur, and their mechanical helpers, the Bits, Rusty helps to foster kids' interest in innovation, creativity, and the "Maker Movement." This Nickelodeon read-along contains audio narration.