So... we've been trying to get our 5 yr old son to finish drinking his milk.

One of the ways we have encouraged him is to explain that milk contains proteins that are good for the body and help build strong muscles. Skim is good, 1% is good, 2% is even better.

He thought for a while, and said...

"Dad, have you been drinking 100% milk?
Cause your muscles are sooo big!"

And that my friends is why being a dad is the best.