Guess what toy I am?

Mathias says,

"It can fly. It has horns. It has a tail. It is big. It has scales."

Lilly says,
"I am big and furry. I am grey. I like cheese. I have whiskers."

Lizzie says,
"I am a girl's toy. I am made of plastic. You can play with my hair. There are many different types of me. My head will come off if you pull it hard."

Sophie says,
"I am furry and very purple. I am a circle shape. I start with s and end in k."