| 摘要 |
A spinning optical illusion greeting card comprising a flat card in the form of two circles 1 joined together 2, each circle 1 having two holes 3 positioned horizontally 4 along the edges to receive two elastic bands. The card has a printed image and when assembled it is spun to create an optical illusion. Preferably the card is folded in half to create one circle, each outer surface having an image. Elastic bands may be inserted through the holes 3 on each side of the folded circle to enable the card to be spun backwards and forwards by hand. The spinning motion may cause the images on each side of the card to combine and form an optical illusion. The elastic band on one side may be untied enabling the card to be opened to reveal and/or write a message (14, fig 8). |
