Besides performance, other exposures include attending recitals, masterclasses, studio-classes, concerts, listen to recordings, watch videos on dvd, youtube, etc. People learn unconsciously by observing and by listening. One will get new inspirations every-time he/she listens to the same recordings even after 100 times because the listening or the observing experience will be different every time. The more we listen to, or watch, a performance, the more our ears and our overall presentations are trained. As well, listening to different interpretations, presentations, as well as exposing to more different types of genres would open up our sight, our mind and would give us more inspirations and thus our music learning becomes more interesting, more meaningful, and more enjoyable.
Please also see Ten Tips to Motivate Your Child to Practice

[...] Reinforcement 2. Reward 3. Negative Reinforcement 4. Punishment 5. Performance Opportunities 6. Exposure 7. Steady Evaluation 8. Understand the purpose of doing such practice 9. Knowing the historical [...]