The ukulele is a wonderful instrument for starter string players, for experienced musicians on other instruments who want a great tool for writing pop, jazz, or vaudeville-style tunes (this is how I essentially came to the uke from guitar), and for playing in the passenger seat and bothering the driver on long trips.
I play and teach baritone, tenor, concert, and soprano ukulele, along with banjo, electric, and Turkish cümbüş versions of all of the above.
“Stopper in My Hand” (original, with some bonus haiku)
“Christmastime is Here” (the Vince Guaraldi classic from the Charlie Brown Christmas special)
“Heyse Latke Kalte Latke” (original – you have the option of learning some poorly pronounced Yiddish)