It depends largely on who is going in. Geriatrics and midgets hugely effect the toy box and the depth needed. Also the inhabitant not being consulted on their occupying the pit leads to the need for bars on top or simply a long leash pinned to the centre of the floor to keep them in.
There should be a length of rope with a basket attached. You should own a poodle called Precious and sing ryhmes like 'One puts the lotion on the skin or one gets the hose again' in a high falsetto whilst prancing around nude apart from a casually draped female skin. For added authenticity push your tackle between your thighs while writhing in front of a large mirror.
For any other tips on being a 'laydeee' gimp see legs.