Education is that which allows one to get into more intelligent trouble.

My kids (4 and 5) yell a lot when playing games on computer. I ssh into game computer and do: chvt 3; sleep 15; chvt 7 when I hear loud noises. This will turn off screen for 15 seconds on linux. I’ve told them that computer doesn’t like loud noises. They totally believe this and beg the computer for forgiveness.