he's going with solar power. he has students who are going to take turns. >> he makes the students wash it, too? >> the sustainability. >> this is a really sweet video. i'm like the mushy type. i cry at sappy muse ing. sappy movies. all of it. >> this 4-year-old's eyes, parents got him in the backseat of this car. >> he is really feeling it. >> this is "say something" by great big world, featuring christina aguilera. adorable. >> i play that song on my guitar for my daughter. >> you want me to keep playing it? >> he's just living in the moment. he doesn't want to turn it off. yes, i'm sad, but -- >> my daughter likes sad song for my daughter as well. >> that's daddy playing the sad song. >> but i expected her to say, that's really good, i really enjoyed that and she got emotional and she started crying.