If you liked Giant Microbes but are really more of a physicist (or a bit of a hypochondriac) you will love Particle Zoo’s subatomic particle plush toys. These cuddly interpretations of the basic components of matter are filled with different materials to reflect the differences in weight between, say, a top quark and a muon. The proton/neutron pairing is pretty cute, as are the quarks. I like that they have prefab gift packs of the various meaningful sets of particles that you might want to buy together. The “whole zoo” of 33 particles (quick quiz: can you name 33 subatomic particles?) looks really cool, though also really pricey.