Have you ever wondered which fruits ripen the fastest? Accumulate a collection of different types of fruits. To maintain consistency, try to obtain fruits that have been picked as early as possible in their picking season (i.e. picked just late enough so that it will ripen as usual but no later). Put each fruit in an environment that is most conducive to its ripening. Allow sufficient time to pass, and observe which fruits ripen first. Be sure to use color, consistency and, finally, taste to determine your results. Record your results in a journal for future reference.