Instead of or in addition to music therapy, consider enrolling your child in a singing or instrumental program that actually teaches and celebrates skills. If your child can learn to sing, he will always be welcome in a chorus. If she can play an instrument, she can join the band. These are not only entries into school-based programs, but also hobbies to enjoy throughout life.
Many kids who have a tough time picking the right words and actions do very well when acting from a script. Acting clubs and camps require no audition and can be a great way to get started. Some kids with special needs discover they have a real talent for acting.
Many children with special needs are quite talented in the visual arts. Schools and community art centers often offer after-school programs in drawing, painting, clay, and even multi-media art.
Several tweens and teens with special needs have great interest and skills in video and a/v. Many middle and high schools have video and A/V clubs, and many towns have local TV stations where kids can get involved. Even if your child is not a creative videographer, she can find opportunities to be confident and valued behind the camera or managing microphones.