3. Oboe
Children have a pretty hard time learning how to play woodwind instruments, and oboe, the number three on our list of hardest instruments to play for kids in an orchestra is one of them. They have metal keys, a flared bell, and a conical bore. In order to produce a sound, you need to blow into the reed which will create a vibrating column of air and the sound will come out. Despite in an orchestra, oboe is well known for its role in the classical music, but it also is common in jazz, rock, pop and film music. This musical instrument will give your child a pretty hard time learning it but once he does the result will be truly amazing and pleasant for the ears.