The Thumb Card fan is a type of flourish used to fan out the cards when asking someone to pick a card in magic tricks. Use your thumb to fan out the cards and your fingers to close up the fan.
Hold the deck of cards neatly in your left hand in between your thumb and the base of your pointer finger. The bottom of the cards should be parallel to the base of your pointer finger.
Step2
Place the thumb of your right hand onto the far edge of the cards in the middle of the edge.
Step3
Drag the cards out with your thumb until the cards spread out into a wide fan.
Step4
Rotate the fingers of your right hand around the fan of cards until your palm is facing downward.
Step5
Grab the edges of the cards with the fingers of your right and close the fan back into the deck of cards, back into your left hand.
Tips & Warnings
You can also fan out the cards with the pointer finger of your right hand instead of your thumb, which is a little harder to do. When doing so, use the back of your fingers to close the fan.
Try to get the fan as evenly spaced as possible. You want the top of the fan to be even and as perfectly circular as you can.
Practice the thumb card fan until you can get it to look effortless.