If you are re-doing your kitchen, I highly recommend a walk-in fridge. Besides the obvious virtues of a big storage space (keeping massive amounts of meat and beer on hand - you can keep a whole cow in there) they also are good for time-outs.
I know some child welfare types (like my mom) would object. But children aren't covered by the Geneva Convention. Besides, five minutes in the walk-in fridge isn't that bad, especially if you leave the little light on.
But make sure there isn't anything really good to eat in there - otherwise you've created an incentive for misbehavior.