We finally caved in and are allowing the triplets "free roam" of the main floor (i.e. kitchen, dining room, and living room). To their delight, there are many grown up toys which entertain their curiosity and interest.... hence, the tupperware cupboard. I wondered how long it was going to take for them to discover it...and it was about 2 days. But once they found it, there was no turning back. 15minutes of sheer fun!