Don Kirkby

Description: Tell your friend to pick one of the cards on your shirt, but not to tell you which one. When they've chosen, turn your back and announce, "I have removed your card!" Created by Henry Hardin in the early 20th century, this is known as the "Princess Card Trick".

Description: Celebrating the classic seven-piece puzzle. Each letter and shape on the front can be made with a Tangram set. The solutions are on the back. The bottom two rows are all 13 convex polygons that can be made.