It’s common for children with attention-deficit/hyperactivity disorder (ADHD) to steal from family members and friends. Knowing ADHD is probably behind a child’s stealing behavior doesn’t make it less frustrating, of course, nor less scary. After all, outside our homes, stealing is illegal. Parents of children with mental illnesses already worry enough about our kids ending up in the legal system. It’s important, then, to figure out what might be causing our children with ADHD to steal.