Switched

1.first take the four aces out of the deck and say to the spectator "if you look at these cards , you might notice that the ink on the ace of spades is in
Different places than-" ................................................................................................. -"
(Now take the top card off the deck , show them , and tell them what it is then put it back)

Step 1:

2.Double lift (secretly take two cards at once) and give the card to them and tell them to keep it face down on their palm

Then glide the card onto their other palm(secretly give them the 2nd bottom card)

Step 2:

3. Ask which one that they think is heavier. Then say"well how would you know , because I have your cards...