Used and cheap, used and cheap! Be aware that WII games and XBox motion games and projectors dont mix because the player is between he beam and the screen, super short throw models or rear projection units can ofcourse work for projection but price and complications arise. IMO kids that age dont need (or some can argue deserve) something that will be costly with bulbs that cost hundreds to replace. The projector cant be turned on and off like a standard tv or monitor aswell. Not that your kids arent great but between understanding operation and limitations along with expense just seems to be good reasons to just get a nice sized monitor on wall or a rear projection monitor and be done with it. Cheers