I have seen a rise in the use of ukulele, from actors and actresses of the big screen, to musicians, and normal citizens. I remember owning a cute ukulele when I was young. I never learned how to use it but had it anyway.
Ukulele is a small guitar with very cute tune coming form a hollow body. It is a smaller version of a guitar but still uses nylon as strings.
Banjo, on the other hand is a round acoustic instrument. We usually see banjos in movies related to the wild west or the hill billies. It is perfect for folk, bluegrass, and country music. It has a circular body with a membrane covered by either a plastic or sometimes an animal skin. You can also find electric banjo – guitarcenter.com if you preferred an electric banjo.