how to make kaleidoscopes and kaleidoscope tools. what to use other than first surface mirror...option #1
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https://www.youtube.com/watch?v=hFRYnAqlPJg
Another episode on making a rotating object chamber. This one shows the concept behind a ball bearing chamber.
email: bdbensley@gmail.com
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https://www.youtube.com/watch?v=9CdN0q-n4_U
one way of many to speed up your slow computer. Please note that I am assuming you have a working antivirus and have no viruses, and don't have malware. And the speed problem is in the operating system itself, specifically Windows. Please ask questions and make suggestions for other videos.
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https://www.youtube.com/watch?v=Crcq0x2eAN0