Its There & GONE, But Comes Back

This is a simple but amazing trick!

The magician shows two cards with a heart and a star on each card.
The audience chooses one card with a star.
Suddenly the star disappears and comes out on the back of the other card!
Even no gimmick can be found. Just happened with your eyes staring.

Complete with: a Pen, a Wallet, and 2 Cards