The Magician displays four aces and places them on top of the deck. Explaining that the pips on the playing cards are actually a solid shape that has been highly compressed.  

Upon rubbing the card on his/her palm the pip actually appears in 3D.  The Magician then turns the playing card face up and Wow! The pip is really missing.

 Many routines are possible with the cards and sponges provided and hey did I mention you can perform a killer matrix routine with the cards.