to fruition. we first met carlos and his mother, maribel, two years ago. >> during that trial he became more friendlier. >> i was more calm with me on the medication. overall, it did have a nice positive affect on me. >> do you think of yourself as a cannabis researcher? >> tap, tap -- >> there's also labs in california that we showed you earlier, and answers from there are slowly arriving. >> we're seeing some pretty impressive changes. >> when you say seeing some impressive changes, what do you mean? >> children's who aggressive behavior was daily and it's gone away, and i mean, gone away. a lot of the kids are more social. >> so what do we got? >> a kiss. >> what is the purple one?