Stick it on a flower pot to amaze everyone! UPDATE V2.5: Improved Handle. 50% Thinner blades to offer less wind resistance. New e-clips for better construction.Design: The other day I saw a big metal pinwheel at a local museum that created a cool optical illusion when it rotated, I loved it... I returned home and began to work on my own printable design. It took many prototypes but I think I nailed it. The special twin blades rotate on opposite directions when the air hits them. The handle has a hole that fits a standard pencil so you can make it longer and stick it on your garden. Check out my other designs here: http://www.thingiverse.com/Dalpek/designsArticle from 3dprint.com: http://3dprint.com/48854/optical-illusion-pinwheel/ http://youtu.be/JVeFi31_f-s Printing instructions:The blades do not require supports. The handle requires small supports.DO NOT print the blades in different colors or you will loose the optical illusion effect!! DO NOT print two A or two B blades, otherwise they will not spin correctly. A and B blades are very different, they are designed to rotate in opposite directions. If your slicer is not working with the blade's STLs then try to set your print layer height at 0.2mm or lower.Assembly Instructions: 1-Slide the blades to the pivots on the handle, making sure the flat sides of the blades are facing each other. Note: You might need to sand the pivots a little bit to make them as smooth as possible. 2-Place the e-clips on the pivots and snap them in place at both ends.You can add a drop of oil at the center of the blades to make them rotate smoothly. Insert a pencil into the handle to make it longer.