I found the coolest little animated film called the bio-DaVersity Code. It uses talking animals acting out a version of the story of the Da Vinci code in order to explain biodiversity. It's pretty rad, actually. I really love that I could find it interesting, but I'm pretty sure a seven-year old could also get it. It can thus spark intergenerational dialogue in a way that, say, An Inconvenient Truth might not. Unless, of course, the child in question is my partner's little sister, who upon seeing Al Gore's film, declared that her New Year's Resolution was "to end climate change." I love that kid.