Hi,
I think it's time to introduce my gaffs
You show the Queen and King of Hearts on top of deck the deck. You snap and show the Jack between them. You tell them, that they are married and it's their child. You lay them down and do the same thing with the Queen, King and Jack of Spades.
You say, that some guys want to fool you: they ask, what would happen if you take the Queen of Spades and the King of Hearts. You take both in your hand and snap, and suddenly there is the
Jack of Spearts, a mix of both.
You tell them, that the King of Spades is now offended and gets a divorce. (You take the King of Spades and the Queen of Clubs.) He marries the Queen of Clubs and a new child was born: The
Jack of Clades.
You say that the King of Clubs could marry the Queen of Hearts, too. (You take both.) Of course their child would be the
Jack of Clearts.
You tell them, that the diamonds are very shy people, but sometimes the King of Diamonds goes to the Queen of Clubs, but only when the Queen & Jack of Diamonds and King of Spades are gone away (You throw them away and take the King of Diamonds and the Queen of Clubs.) You tell them, that their child would of course be the
Jack of Clubmonds, you make him appear using a Hot Shot Cut.
That's it. Of course you can use many other ways to present this ;-)
Here are the pictures:

from left to right: Jack of Clades (Clubs + Spades); Jack of Clearts (Clubs + Hearts); Jack of Clubmonds (Clubs + Diamonds); Jack of Spearts (Spades + Hearts)
I hope you like my idea
GunsnRoses