The bio teacher was a Brit. One day she told the class that the average IQ in the U.S. was 110, while the average IQ in Great Britain was 98 "Probably because we imported so many Irish."
(True. It would be much lower if they hadn't.)
I purchased a St. Patrick's Day Card that proclaimed the recipient an honorary Irishman. The entire class signed it, and it was presented with some ceremony on the appropriate day.

This same lady gave us the offspring of her siamese cat and a gray and white tom about town. When he came of age, she asked if we were going to have him castrated. When I said we were, she asked for his testicles.
It just seemed right to gift wrap the little jar, and include a gift card from the cat.