Really, his expression is the best part.
Yesterday T walked up to our growing lima beans and (because of static electricity) they "jumped" back from him. We might have told him that they were afraid of him--he needed to approach them a bit more slowly. (Awesome parenting. ;) Then because of the static electricity, or because they really were just looking for something to climb, the top of the bean plant seemed to dance around his finger when he held it out. He was enamored. By a bean plant.
We also told him that plants love carbon dioxide (thanks to Botany class.). He was more than eager to share. (Hence the face.)