Yup you read that right. My five year old ds is an escape artist. It got to the point that we got a call from the police in tje middle of the night because he was wandering the streets. We put locks on all doors leading to the outside but then he started raiding the kitchen at night. We tried the alarms for the doors but he would open and close them really fast and it would wake us up. He also thought it was funny to set them off and then go lay back in bed until the whole house was awake. So we put the chain lock on the door. He shares a room with his 10 year old brother so before bed his brother locks it. My ds is not tall enough to reach. There is a bathroom that connects the two rooms so we put one on our door also. Now he does not sneak out and get in trouble.