Andrew Pelham calls his device the E-Z Baby Saver.
He created it for a contest by the University of Akron that required kids to invent something made primarily of rubber bands. It's a long cord, one end hooks onto the back of the driver's seat, and the other end attaches to the driver's side door. The driver can't get out without remembering to look in the back seat.
"I just hope that people can use my design in the real world, soon, because I just want to save one life, and then I can say my idea was successful," said Pelham.
Pelham has two young siblings still in car seats, and his family uses the E-Z Baby Saver all the time. His invention won the runner-up prize in the contest he entered.