Luke loved romping around the yard with Arya more than anything else about these dinners. It brought back fond memories of his own childhood, chasing bugs with his own dad. He's got the jar, and he's trotting along after her, holding it so she can deposit her catch. And as he does so, he gets a little bit wistful. His little girl is growing up, and it's hard not to see it and think how it won't be too long and she'll be too old for this sort of thing.
Sorry this is late ~_~
"Hey! There's one right over your head, kiddo!"