I agree, mine used to drive me nuts running around the house at night and because they were indoor & outdoor cats, they had bells on too so if it wasn't jingle jangle crash boom all night, they'd be at our bedroom door meowing to come in for snuggles! We started putting them in the laundry at night with a big cosy bed, some kitty litter and lots yummy food & water, they then settled in for the night, slept siently and did all their exploring through the day... Now we back onto a big bushland resevre and have a gorgeous rear timber deck, they're mostly outside anyway... So maybe try "tucking them in" to a smaller rom at night.. Good luck!! Cats are traditionally nocturnal I suppose