Replace the cream in their Oreos with toothpasteAnd watch them dig in. Or put some real mud inside a chocolate mud cake and give it to them.
Have you decided? For me I'd put real or fake spiders above their head, put ice outside the bathroom ིི and toss their underwear out of the window
If they are girls, fill the hairdryer with flour so when they have a shower and go to dry their hair... DUN DUN DUN Who wins now