It has very much. I played with LEGO my entire childhood, and I can see it becoming useful for building things in a creative way - but without having to think much becuase I think it's so obvious how it can be solved. With this in mind it's important to try to build things in other ways of course, and that was _why's point - but only if you think it's fun though. In short - as mentioned in many comments now: Try to do things that you find enjoyful, then this play might become very valuable for you or for others in one or many ways.