Botany Lab, Carnegie Museum of Natural History, Oakland.
Preschool-aged children are taking part in a behind-the-scenes class:

Botanist: So what did everyone have for breakfast this morning? I bet most of you ate some plants for breakfast this morning.
Little Boy: I had waffles!
Botanist: And those are made from wheat, which is a plant.
Red-Haired Girl in a Fancy Pink Dress: I didn’t eat plants.
Botanist: Well, what did you eat this morning?
Red-Haired Girl: Cheerios and a banana.
Botanist: [cheerful, supportive tone] And Cheerios are made from grains, which grow on plants. And bananas are plants too.
Red-Haired Girl: [stamping her patent leather shoes] I DON’T EAT PLANTS!
Red-Haired Girl’s Mom: Shhh, now honey, yes you do.
Botanist: And how about what we’re all wearing? Lots of our clothes are made from cotton, which grows on a plant! And without plants, you wouldn’t have been able to drive here to see me today because tires have rubber in them, and rubber comes from the rubber tree whi—
Red-Haired Girl: I DON’T BELIEVE YOU!!!
Red-Haired Girl’s Mom: OK, that’s enough. [She grabs her daughter by the hand and
leads her out.]