You needn't learn Lojban for any practical purpose, however. Many of those learning Lojban are doing so because it is fun. Learning Lojban is intellectually stimulating, and provides human interaction and mental challenge. Lojban has all the benefits of games designed for entertainment, with the added prospect of developing useful skills as a side benefit. Learning Lojban as an 'intellectual toy' means that you can get enjoyment from learning Lojban without nearly the effort needed to benefit from studying other languages. While becoming fluent in Lojban will probably take hundreds of hours over several months, you can feel some sense of accomplishment in the language after just a few hours of study. You can use Lojban immediately for fun, while gaining skill with greater experience.