1: In general, I think, since this is a children’s institution, it could be done to protect children at the exit. My son went out and no one noticed him.
How do you imagine this protection? Invisible rays at 120 cm. If someone goes down, is there an alarm? What if the dwarf gets pregnant?
1: Eem... I meant a two-sided button, like the usual in dentistry. But, of course, a laser grid that tears dwarfs into pieces is much more effective.