|Giving the guys something to aim at reduces boredom and provides incentive to not miss.
Around here you might see this:
Worked like a charm, especially when paired with the observation, "How can I take you hunting? You have to be able to hit the heart-lung area from 70 yards if you want to hunt with me. You are showing me you cannot even hit an entire deer from 18 inches"
And yes, the walls really are that shade of green. That is what happens when you let kids decorate their bathroom.