Who is out there? / Safety Supplies

Children’s eyelevel is low because of their short height. It would be of no use to develop a door peephole for children through which the outside cannot be observed at the eyelevel of adults. Children will be able to look outside at the eyelevel of adults by using the periscope structure inside the door.
Children’s curiosity can be satisfied by allowing children to look outside at the eyelevel of adults and it would be effective in prevention crime against children by observing the comings and goings of outsiders.