SAN ANTONIO -

11-year-old Andrew Pelham of Brentwood, Tennessee, heard stories about children who died after their parents forgot about them in their cars. It moved him to invent something that could save lives.

He calls it the E-Z Baby Saver.

Made of rubber bands and tape, the device stretches from the back seat to the driver's door. When the driver opens the door, the device won't let him/her get out without removing it - a reminder to check the back seat of the car.

Pelham's invention won second place in The Rubber Band Contest for Young Inventors. He used his $500 prize money to buy a laptop.

Pelham is not selling the device, but his website gives instructions on how to make one.