the idea is to buit a simple object standing on the table. A led strip give the child it's sound level,
on a easy understanding way : green it's ok; yellow it starts beeing disturbing for the others, red : keep calm !

the teacher will set the different sound level in order to adapt the object to the child along the year.

on a second time, i want to record data in order to get the profile along the day, the week, period,... for stats and reward the child for efforts :)