A young boy named Rusty Rivets uses his knowledge of engineering to repurpose machine parts and create gadgets. He lives in the city[citation needed] of Sparkton Hills along with his friend Ruby Ramirez, a robotic tyrannosaurid named Botasaur, and a group of smaller robots known as the Bits. The show highlights a variety of concepts related to basic science and technology. Rusty uses the recurring catch phrase "modify, customize, Rustify" when personalizing inventions. Ruby changes the last word to "Rubify" when she does the alterations (only once), and Liam changes the last word to "Liamify" when he does it (also only once).