I second the OT for assessment. Braingym are great exercises. You can pretty much do it all yourself without a therapist if you search around for the exercises or get a braingym DVD. We do play with my son like encouraging him to crawl while we're pretending to be animals, or getting him to draw while lying on his tummy or getting him to push trains along a track in front of him across his midline (he'll usually move his body to avoid crossing the midline, or swap hands).