curious

adjective

1. Tending to ask questions, or to want to explore or investigate; inquisitive; (with a negative connotation) nosy, prying.“Young children are naturally curious about the world and everything in it.”
2. Caused by curiosity.
3. Leading one to ask questions about; somewhat odd, out of the ordinary, or unusual.“The platypus is a curious creature, with fur like a mammal and a beak like a bird.”
4. Careful, fastidious, particular; (specifically) demanding a high standard of excellence, difficult to satisfy.