The magician shows a cute picture of a rabbit in a hat to his audience. Taking the picture behind his back, the magicians claims that he'll be able to make the rabbit turn around. When the picture comes back into view, the rabbit is seen to be turned around.
But the kids suspect that something is up.
They assume that the magician simply turned the rabbit around behind his back, and is now showing them the opposite side of the picture.
The magician repeats the "trick" and the kids scream at him. They know how it's done!
In the end, the magician shows the children that on one side of the picture is a brown rabbit, and on the other side is a question mark hovering above the hat. The white rabbit is gone!
Extremely easy to do. A great piece of "sucker" magic.