“Why do giraffes have long necks?”-Student

“Hmm… I don’t know, why do you think?”-Cassie

“I don’t know.”-Student

“Well, I do know something about giraffes that might help us figure this out… Do you know what giraffes eat?”-Cassie

“Leaves!”-Student

“Yeah, that’s right, they do eat leaves, and where to do leaves grow?”-Cassie

“On the tops of trees! That’s why they have to be tall! Will you lift me up she giraffe can eat the leaves?”-Student