He’s the best dad…ever:

I like the writing project you have successfully begun today. It is like running a marathon of 26 miles, except you are writing a marathon of 50,000 words!
Rocky, you can do it and by making a public announcement, we’ll be checking in on your progress as you reach various milestones like 5000, 10000, 15000 …. words.
Good luck.
Love, Paw
In case you’re wondering about the nicknames Rocky and Paw, I wrote about them here a couple of years ago.