Drums!
We keep drums out at our house all of the time. The Panda Drum is my favorite, because it is soft, and even if the kiddos bang on it the notes sound amazing. Some children don't like the sound of the drum, but many do and it can be a way to stim for many children on the spectrum.
I have found that drum circles can be a great way to socialize and feel connected, while bypassing the social difficulties. Give it a try -- even having them at home can be a great mode of connection and expression!
Here are two drums I can personally recommend:
