With autistic people, they tend to be fixated on one thing. Your thing are butterflies.

Cori stands close to you as the two of you walk in the butterfly room. It's the only room you ever want to go to at the zoo.

"What's this one called?" He asks curiously as he points at a butterfly that landed on a leaf.

He smiles as he sees you begin to talk about it. He listens to every word but is hardly looking at the butterfly.