Safety 1 OutSmart Lever Lock. Curious kids try to explore everywhere, but the Safety 1 st OutSmart Lever Lock helps you keep them safer with the first ever decoy button. Your child will think the decoy button will let them open the door, but pushing it has no effect. Youll know that the surface on the sides hides the actual secret to opening the door. The Lever Lock is a clever way to prevent your little explorer from accessing off-limit rooms.