what was a source of unending joy for valli what was the strongest desire

According to the search results, Vallis source of unending joy was the sight of the bus that travelled between her village and the nearest town, filled with a new set of passengers each time it passed through her street. Her strongest desire was to ride on that bus. Valli saved every coin that came her way and made great sacrifices by controlling her normal childish urges of having candies, toys, and joyrides. She wanted to ride on the bus so badly that it became her deepest desire.