Abstract: An alarm system for reminding a driver of the earlier placement of a child in the backseat of a vehicle usable with both a one piece car seat and a two piece car seat comprised of a carrier and base includes in a first embodiment a rear sensor, driver door opening sensor, a control unit, alarm means, and deactivation switch wherein the opening of a rear door activates and arms the system automatically so consequently the alarm means is energized and activated anytime thereafter when the driver opens their door, thus reminding the driver when they are exiting the vehicle of the child in the back. The driver then deactivates the system manually.