Dandelion Wine - Ray Bradbury

"Last February," said Tom, and chuckled. "Held a matchbox up in a snowstorm, let one old snowflake fall in, shut it up, ran inside the house, stashed it in the icebox!"...
"Yes, sir," mused Tom, picking grapes, "I'm the only guy in all Illinois who's got a snowflake in summer. Precious as diamonds, by gosh. Tomorrow I'll open it. Doug, you can look, too...