Using common pencils

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  • If the axles don’t fit the wheels, you’ll need to do some adjusting. If the axles are too big (in diameter), try sharpening the ends in a pencil sharpener and jamming them through the wheel opening. Once the wheel is centered on the axle, add a drop of hot glue to hold it in place. If the axles are too small for the wheels—a common problem if you’re substitut- ing CDs for wooden wheels—you can add an insert or attachment to the wheel. Use lids from milk cartons or small wooden wheels to hold the axles. Then tape the lids or small wheels to the CD. Spin...

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  • Important notes about the images The boardroom image on the cover and p.7 and the image of the pencil-clock on p.43 are licensed from for use within this document. If you wish to use them elswhere you should purchase a licence from The images at the start of the other chapters are republished from Flickr under a Creative Commons Attribution Licence

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