Someone please help me i have like a couple of minutes! Which detail from "The Piñata" supports the theme that hard work yields rewards?

My mother sent me to his home every day in the summer to keep him company. "He has no one," she'd say, "since your nana passed."
He had bags of colorful rubber balloons stashed all around his garage. He took two of them and blew them up.
I got up from my place at the bucket and grabbed two empty milk jugs from the hundreds that were lined up in neat rows. I handed them to him.
"Tomorrow you'll put on the paper and the decorations; you remember how I showed you?"