My favorite memory of Dr. Nels (and there are many) is of him getting down on the floor with Kelly, on Molly's first birthday. He played that Memory card game with Kelly, laughing and yet teaching the entire time. I was enthralled with his gift of turning education into play and love. The world needs many, many more men such as he.
My sincere sympathy to Jackie, Kris, Tom, an the entire family. May you be blessed by his memory.