basically , it was a box , but inside the box , there would be a complicated net of constraintsrubber tubing , pipes , straps , buckles etc -- that could be attached to each of neds moveable partsarms , legs , head , jaws , finger , toes , stomach etc -- such that it not only prevented ned from leaving the box but also prevented him from doing pretty much anything he might want to do while inside the box ( eat , sleep , roll over , scratch behind his ear etc ) .