Terrible Idea, onegoal.
Its a waste of time. Complete waste of time. AS Rav shalom arush says in his book “garden of emunah” people want to know that they are doing something with a purpose in life. FOr ex. if you were to ask someone to lift his arm up and down and up and down repeatedly for 1 hr, he would refuse, because there is NO TACHLIS! Even if you were to pay him, he’d likely refuse.
To teach children to kill time is bitul z’man and not a yiddisher mentality. We have so much to accomplish here.