Android equivalent of an iPod Touch (or iPad Mini)

I'm looking for a small Android device equipped with Miracast that I can use in my car to cast movies and TV shows onto the rear seat TV's in my new Cadillac Escalade.

Not looking to sign up for a cellular contract with any new device... I just need something with plenty of storage space, that's not too large so it's easy to store in the glove compartment or center console, and it must have miracast, which I guess will be the primary method my kids use to play movies in the back seat.

Any suggestions? Thanks!