Physics marble track review part one . Homemade Science with Bruce Yeany

Physics marble track review  part one . Homemade Science with Bruce Yeany
  Bruce Yeany
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Track material is easy to work with and cheap. it is called shelf bracket tracks or shelf uprights. I have seen various hardware stores and building supply stores carry it, one company that makes it is Rubbermaid. E5 shelf upright. available at Home

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Art  Homemade  


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