Get one of those invisible fences they use for dogs, except make the 6 y/o wear the shock collar. Put the barrier field three feet around your system. Every time the kiddo tries to cross the line....ZAP!! Or you could use mousetraps.
OK, maybe not. On second thought, maybe you'd better just put the thing away or cover it with a blanket or unplug it or something......
OK, maybe not. On second thought, maybe you'd better just put the thing away or cover it with a blanket or unplug it or something......