the part about this that's the best is it goes something like this: prof- "assume a cow is a sphere" student-"ok. that's reasonable. wait? what?"
I'm assuming you're aware of http://www.squishable.com. If you're not...you should be.
*giggles* I recently came across this:
Looks like someone beat me to it.... Gerrr you Edana!!! *gerrs her*
where are the legs? :o
My money's on the sphere ^_^
I actually bought some cups because they had pictures of pigs approximated as spheres on them...