What is the best musical instrument to learn?

Piano. It is the kind of all musical instruments. With a tuned piano, even as a beginner, you can play simple and beautiful songs after learning it for a short amount of time. Playing piano is very good for brain development, especially from the intricate muscle movement from your fingers. Often studies have shown a positive correlation between high IQ and people who are good at playing piano. In some way, piano is designed in a very scientific way, since it is based on frequencies. You can also be very creative when playing piano. It is the best instrument to compose songs.