This week, the League was asked to show off a shelf of items that expresses our love of pop culture. While this may not technically be a shelf (it’s a piano) I think it counts.
Give a collector a flat surface, and it will fill up with items overnight. Give that surface several tiers, and you have a great layered display! (High res version here.)
When I was allotted the cave, the piano came with it since it was too heavy to move. One of these days, the kids will realize we have a piano and want to play it, but until then, it will be used as a rotating display shelf where I mix new acquisitions with old–basically, whatever I feel like looking at in a given week.