I believe it is when the speaker said “Oh, just another kind of outdoor game”, is the line that shows a bit of amusement. The speaker likened the hard task of repairing a wall with something like a backyard game. You could sense a playfulness with a smile in the way he said it. It’s as if he accepted that he has to do this anyway, why not pretend it’s fun.
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Responsible and Hard working.
During this day We needed a responsible, well mannered and hard-working youth.