involvement,
interest a connection of inclusion or containment; "he escaped involvement in the accident"; "there was additional involvement of the liver and spleen"
curiosity -
something unusual -- perhaps worthy of collecting
Curiosity (from Latin curiosus "careful, diligent, curious," akin to cura "care") is an emotion related to natural inquisitive behavior such as exploration, investigation, and learning, evident by observation in human and many animal species. The term can also be used to denote the behavior itself being caused by the emotion of curiosity. As this emotion represents a drive to know new things, curiosity is the fuel of science and all other disciplines of human study.
OmegaWiki Dictionary
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curiosity The desire to learn or know about anything.