Being inspired by a museum created by ehickey, I have started on a museum of my own, the ultimate goal of which is to display every item in game that I can. This includes stuff I have in my arboretum and zoo, which means yes, I am collecting animals too, and will later create an area to display hostile mobs (zombies, creepers, etc). So far I only have world blocks on display (dirt, stone, emerald ore, bedrock, etc), and am working on additional rooms for food, tools, weapons, building materials (stairs, fences), redstone, etc.
I have placed a chest near the museum for anyone who wants to donate. Please place anything you want to donate in the chest at Bob_Keep,donation, and let me know so I can acknowledge you on my wall. Thanks!