Aspiring to build an amazing derby car out of junkyard parts, Peg and Cat enter the neighborhood Tallapegga Twenty and use their shape-recognition and counting skills to assemble their car and count laps in the hope of winning the Golden Cup.

"This book is based on the TV series Peg + Cat. Peg + Cat is produced by the Fred Rogers Company. Created by Jennifer Oxley and Billy Aronson. The Race Car Problem is based on a television script by Kevin Del Aguila and background art by Amy Delay."--Colophon. "PBS Kids"--Cover. "With fun math activities!"--Cover. Math activities located on back of dust jacket. Based on: Peg + Cat (Television program).