Abstract: A decorative motion detector, and a method for its use, that is preferably mounted in the interior of an occupied dwelling near an interior doorway area wall to a child's room in an operative position to warn a parent or guardian when people leave or enter the child's room through that doorway. The detector is mounted to an essentially planar base member having a rear wall, a decorative front wall, and a cavity therebetween so that its presence in a conspicuous position near the interior door is aesthetically pleasing and so that the decorative design on its true function of the present invention is disguised. When armed, the present invention generates a signal upon detection of movement within the doorway and the signal is transmitted to an alarm device that may generate an audible alarm, a visual alarm, or both.