The piano and string instruments (such as a violin and guitar) are great choices because they give children a solid foundation in reading music and music theory that will help with learning different instruments later. Many string instruments also come in smaller sizes, making them easier for young children to play. Larger brass and woodwind instruments can be considered when she’s a bit older and has the strength to handle them. Most importantly, involve your daughter in the decision and make sure she is excited about the instrument you choose. Forcing a child to play an instrument is unlikely to lead to a love of music.