I just wanted to remind you how delicious fresh orange juice is and how when you buy "juice oranges" from the grocery store, the price is comparable to the cartons of pre-made juice.
If you have slave labor, they actually seem to enjoy this more than cleaning up their rooms or doing their homework. Keep that in mind the next time you reach for a carton.
Up here in apple country, the slaves like turning the wheel on the apple press to make cider better than cleaning or school work. Must be something about juice.
I think the secret is to never call a chore. Or healthy!