Curiosity (noun)

1. A strong desire to know or learn something.
2. A state of being curious.
3. An object or thing that inspires curiosity.

Origin:

Middle english curiosite, from old french curiosite, from latin curiositas, from curiosus "inquisitive".

Examples:

1. Her curiosity got the best of her and she opened the box.
2. His curiosity led him to explore the dark forest.
3. The strange noise piqued his curiosity.
4. The ancient artifact was a source of curiosity for the archaeologist.
5. The child's curiosity was insatiable.