Father's Day was near when I brought my three-year-old son, Tyler, to the card store. Inside, I showed him the cards for dads and told him to pick one. When I looked back, Tyler was picking up one card after another, opening them up and quickly shoving them back into slots, every which way.

"Tyler, what are you doing?" I asked. "Haven't you found a nice card for Daddy yet?"
No," he replied. "I'm looking for one with money in it."