Can You Tell Which Thing Is Not Like The Others?

♪♫One of these things is not like the others,
One of these things just doesn't belong,
Can you tell which thing is not like the others
By the time I finish my song♪♫

(I took this picture at a relative's house.  I've seen this many times.  I've always been so awestruck by the organization of everything that I guess I failed to realize how funny that dang rubber chicken looks hanging there among all those tools!  Thanks for the laugh, B-I-L!)