"Oh! Like...a camera and a phone in one. Except phones usually have to be attached to a wall. A phone camera."

That's neat! He'll have to figure out how to use it, because it would be fun to take lots of pictures!

Then, looking at his new green friend and wondering about this place and the people here, he asks, "And what are people like here? They don't react badly to you being green, do they?"

He's wondering how they might react if he ever gets wet and shows his own green skin.