Had to give my 11 year old a stern talking to earlier 'cos when I was making her bed I found a load of bogey's just wiped on the wall - grubby bugger must lie there reading her book and picking her nose!
Told her that she had to clean them off bare handed as that's how they got on there (she requested baby wipes and I refused point blank) and put them all in toilet paper and that if she didn't do it immediately I'd use them as pizza topping in the future and tell her after she'd eaten it. Also added that if I catch ANY snot on the wall in the future I'll do the pizza topping 'thing'.
Inside I was cracking up as she was completely horrified and promising to never EVER do it again.
Walked away after that conversation with a proper swagger - that's parenting