I sometimes play the ukulele when I'm thinking about something in my room. I often feel relax with this simple, light and easy instrument. It has four nylon strings tuned to GCEA. It is characteristic that the first G is usually raised one octave. Some people drop the first G one octave, which is called "Low-G tune," to spread the lower range, however, I prefer the normal tuning because it sounds more ukulelish. As I have been playing for years, I can play several songs, but I feel a little bit bored with the same songs. I'm now reading a ukulele code book because I hope to play whatever music I like with a melody and codes. The code theory looks interesting just like a puzzle. If I could fully understand the code theory and remember some finger patterns, I might be able to play ad-lib. If you think ukulele is a kind of toy instrument, I strongly recommend to see this video. You must change your opinion to this instrument.