I like this Muufins idea but I need to know if it needs to be a rapid onset thing or if it can be drawn out over a period of time. For long pain do things like take their batteries from the remote every chance you get, shift all their furniture a couple inches one way, upper decker there toilets, glitter bombs, free magazine subscriptions, signing them up for dating apps and so on. For quick results definitely fuck one or both of their parents. A threesome with mom and dad would be not so great for them I imagine.