I am glad you chose to reward a son who accepted his mother's "no" with grace. You are very kind and I will find a few extra dollars in my budget to accept your challenge!!!
For what it is worth, I was grocery shopping recently and had a young man step into line behind me with two items. I let him go in front of me (despite having waited a while in the line already) and he was very thankful. Really, that was no big deal, so I am going to find a BIGGER challenge! Thanks for the motivation!