I did babysitting in my home and one of the first things the children did was learn fire drills. It was so funny seeing these kids climb out the window but I was so proud of them for following directions. Biggest one helped them get out then second biggest brought them all to a safe spot. They did a super job. I didn't know about the batteries till watching this video. I'll have to check all mine to make sure all is well. Thank you for the information.