NEW YORK — Child star and activist Mia Armstrong has a picture book coming out next year about her experiences with Down syndrome, what her publisher calls “all the joys and challenges.” ...

Armstrong is the first child with Down syndrome to provide the voice for a cartoon character, the superhero Eon on the Netflix show “Action Pack.” Her other credits include “Hello Jack!

NEW YORK (AP) — Child star and activist Mia Armstrong has a picture book coming out next year about her experiences with Down syndrome, what her publisher calls “all the joys and challenges ...