the pig that wasn't...

This weekend I was manning a demonstration stand at the Young Scientists Fair in Dublin. This little piggie was our star attraction.

Try to pick him up, and you'll come back empty handed.
Try to touch the glass he stands on, your hand will pass straight through.

Because piggie isn't real. He's a virtual pig, a trick of the eye.

Like all the best tricks, it's all done with mirrors :)