Pebbles
My daughter, for reasons I don’t quite understand, loves rocks.
If she sees a large rock, she tries to pick it up. If she sees small rocks, she picks through them, collecting the ones she likes best.
Maybe she is on a path to becoming a geologist, which would be fine. Geologist’s salaries are on the rise, and the job seems fairly secure.
The only drawback to this interest in geology is that I find little piles like this in the house from time to time:
