9-year-old Ben approached me with an excited look in his eyes.  “I hear the ice cream truck,” he explained and pleaded.  “Can we get something?”

Reaching into my wallet, I handed him a $20 bill with the instructions to purchase four ice cream items (one for him, his two brothers, and the dog).  Ben smiled and ran off.  No  time to waste, when you are chasing a truck.

Soon Ben returned with treats in hand.  After a few minutes, I asked, “Where’s the change?” Ben looked at me with innocent 9-year-old eyes and said, “I left a tip.” A bit confused and starting to suspect what happened, I followed up with “How much?” “$8” was his swift response.

That’s right, a 66% tip.

Now, I don’t know much for certain, but I do know that the ice cream truck will return to our street.