Another idea(s) kept thinking of different kinds for this one and mixing them all seemed kinda blegh.

Elementary School: Crisp, white paper, pencil shavings and graphite powder. A slight hibiscus in the breeze and a warm, earthy scent.

Or instead of the flower and earthy stuff, do dry erase markers/chalk and crayon smells.

Or sharp pencil wood, dirty cement, and the smell of a playground long loved and played on.

Ahh, good days when I was small... It probably wouldn't be the best perfume, but it'd make me a bit wistful for the past. If it worked on me, I'd wear it a lot.