I saw the idea for this great matching game in eggs from Playing House and set out to make one of my own. I found some images of Elmo, an ear, an egg, an eagle, an eye, and an elephant online, printed them out, and cut them in half.
They fit nicely in large plastic eggs.
Trip actually had a great time opening all of the eggs, finding the matches, and putting together the puzzles.
If you would like to make a set of these puzzles for your own personal use, the PDF is available here.