Some parents are giving their autistic children marijuana. They report pot is helping their kids feel better. Autism has no cure and there are few proven treatments. So parents who make this decision often say they're desperate for something that helps. But critics say marijuana can harm a developing brain and that this is essentially an experiment without federal or medical oversight. We get both perspectives from Colorado Public Radio's Zachary Barr. Then Ryan Warner talks to Betty Lehman of the Autism Society of Colorado about a new law that requires some insurers to pay for a proven autism therapy.