Good idea idea, Jeannie. However, last night after visiting a friend, I pulled the car in the garage, closed the door with the opener, grabbed my purse off the seat and got out of the car with it still running. The hubby says 'are you going somewhere else?' Uh, no and kept walking towards the bathroom. If he hadn't been sitting there in the family room where he could hear it, (I am almost totally deaf) the stupid car would still be running. Think there's a device that would scream 'Turn the car off, moron?" in the dollar store? If only.