We also got to hold some owl talons and hawk talons. (When I say "we" I mean "the kids".)
I thought there would be one animal carcass in each pellet, but it turned out there were four or five.
Everyone had to pick all the little bones out of the pile and identify it according to a chart we had. We identified ribs, hip bones, skulls and vertebrae! We also were usually able to tell if the owl had eaten moles, mice, birds, and shrews. We even found the remains of a caterpillar in one pellet.
Some days I wonder if it would be nicer to send my kids to school. They would come home from a day of dissecting owl pellets and I would ask, "What did you do today?" And they would reply, "Nothing." And I would go about in blissful ignorance of what a regurgitated mole looks like.
Ah well. Homeschooling is not for the squeamish!