Wonder was an emotion that had a feeling of surprise and admiration that people experienced when they saw or experienced something rare, unexpected, or beautiful.
In 2368, when asked if he liked what he was consuming, Data confessed to Timothy that "I have often wondered what it must be like to have one's mouth water in anticipation of the arrival of a confection, or to feel the pleasure I have observed in humans as they consume it." (TNG: "Hero Worship")