Happy 60th, Mom and Dad!
For my mom's birthday, she and my sister came over and slept on the floor of my apartment in Davis, despite the availability of perfectly comfortable and reasonably priced lodgings downtown. For her birthday, we found a fetid puddle of water near Lake Berryessa with some tadpoles in it. She was delighted.
For my dad's birthday, he's celebrating his election to the National Academy of Engineering (the sister organization to the Institute of Medicine. He also got this birthday card from his longtime college friend Bruce Reznick :
Bruce is a professor of mathematics at the University of Illinois. He studies the identities of high-order polynomials. So, this really is the a birthday card only he would think to send.