They are honestly unbelievable, don’t get me wrong I’m no parent expert or ever claim to be but to allow you’re child to draw on a glass door is the next level of stupidity, like you said if he draws on the walls he will think that’s fine because his allowed to draw all over the glass windows and she’ll go mental at him! My daughter knows not to draw all over the walls and windows, but she’s got a chalk board etc which is absolutely fine to scribble all over!Thats the funny thing though... He has an easel you always see in the garden.. Most have a white board on one side chalkboard on the other... You see it in the background all the time.. Yet they've opted for windows? He'll get a right bollocking when he draws all over their walls in the house cos he doesn't understand why windows are OK but walls aren't.