Kozloff: I made a foil contact for my child in the bed, when the child inside - the current on the bell goes through the resistor, when the bed is empty - the bell rings in full force. It is quite simple, given that the child is in bed only when he is asleep.

Mikhailov: With natural soaking the girland can work, with special effects. It is said that one Soviet engineer so healed his doll from enuresis, there was also a simple scheme, only with a lamp in the neighboring room instead of a call, and he was just wrong with the resistor nominal - instead of MOm took the same, only kOm! Lila only once after installation and described, and then - no-ni!