Absolutely, and why not! However, concert ukes may be too large for most five-year-olds. The smallest of the little ukuleles, the soprano, is sized aptly to fit into a child’s hand. Nevertheless, the best age for a child to start playing an instrument is when they show an interest in it. For many children, this can be around the ages of five and six, and even though it is possible for children to start playing an instrument as young as three, they will need that particular degree of coordination and patience to sit through a music lesson.