curiosity

noun3

1. •
   the wish to learn about things and to find out how they work or why they happen

   • They learn that reading, besides being something one does at school, is also something one can do on one's own, for fun, to satisfy curiosity, or even to "expand one's horizons.” — 1972
2. •
   A unique or extraordinary object which arouses interest.

   • He put the strangely shaped rock in his curiosity cabinet.
3. •
   (no longer used) Careful, delicate construction; fine workmanship, delicacy of building.