Finally saw Martian Child, starring John Cusack and Bobby Coleman as the adoptive father and son. It came out with little fanfare, didn't stay long in local theaters, and I read only one or two reviews about it, so I wasn't sure what to expect, but I'm glad I picked up a used copy of the DVD--and for a mere $5.
It's about a boy named Dennis who claims to be from Mars, and about the widowed science fiction writer who adopts him. It's a quiet, sideways little film about family, love, and acceptance. And science fiction in many forms. Highly recommended.