You know you've been teaching Human Osteology too intensively when...

... your preschooler brings this play-doh sculpture home and you think, "That's a remarkably good left clavicle!"

Seriously, though.  It's got a bulbous medial end, a tube-shaped shaft, and a flattened, anteriorly-projecting lateral end.  It's creepy how much it looks like a clavicle.  Is this the osteological version of pareidolia?

(She told me, by the way, that this is the Very Hungry Caterpillar.)