Giant microbes! Plush toys of pathogens, carriers of pathogens, and cells of the body. The Epstein Barr Virus (causes glandular fever/mono) is my favourite. You can get them all here.
I was going to work for a meeting, and saw this sheep in the carpark!
This Karyotye, by Kevin Van Aelst, made from sour worms!
This dress from modcloth.
This drawing from a series by Ella Mobs. You can get them as brooches!