I too have a small child utterly facinated by the cables of my office with three computer systems and numerous external disks and power cables and wires galore. I use wiring racks, hooks, cable ties and cable "hoses" and all manner of things and still have racks yet to be assembled when time permits but there is still plenty of cabling. My wife most elegantly put a baby fencing door across the doorway to my study / home office and child doesn't get in without strict supervision. That at the end of the day is the only utimate real solution. Mind you lots of folks have already mentioned a number of localised solutions which - budget permitting - are all worth looking into. Overall strategy is to lock junior out of the room unless your in there with him/her. Good luck!