RUMBLEBOT RACEWAY is a school classroom science manipulative that combines fun with experimentation.

Rumblebot Raceway 2 is designed as a school classroom science manipulative, but it's also just a lot of fun to play and experiment with. I am going to sometimes refer to this as a toy, because I see many toys as wonderful objects that can make learning fun.This build project is based on an article by Doug Stith in the popular DIY publication, MAKE:. His contraption was inspired by Hog Hollar, a game invented by Bob Knetzger.

Upon the first demonstration of this toy to the 6th grade students at our local intermediate school, the kids went nuts (as in nuts & bolts). They all started grabbing anything they could find and dropping it onto the vibrating surface just to see what happens. They intuitively started experimenting. This brings me to the point of telling you that a Rumblebot can be basically anything that will go down this track from start to finish, under no power other than the vibration it gets from the surface. A few of the students asked about "the rules". I told them that there really aren't many rules because we want them to be innovative and open minded. I suggested that they be considerate and courteous to the other teams and make up rules as they go along.

A design feature that helps to make the finish line simpler is that there is an open end to the track. Doug Stith had told me that some of his more creative students decided to make their Bots long so that they would reach the finish line sooner. Well, in this version the winner should be the first one that completely drops out the end. Now a longer vehicle might be a disadvantage!

My version of the Rumblebot Raceway acts upon the same vibratory motion as Doug Stith's original. I used his as a launching point to move forward with added features like an internal gear drive mechanism with a 2:1 ratio, transparent polycarbinate race surface with a replaceable clicker trigger (if it gets worn), cranks on both sides for left or right handed operators, and 3D printed parts.

The most important new feature is that this design can be "flat-packed" for shipping and storage. A robust fastening system allows the main box frame to be assembled and disassemble over and over.

I do intend to eventually have plans available, so please check back here in the future. UPDATE 2-27-17: Still working on the web site.

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• Router Bit - http://bit.ly/ToolsTodaySolo
• Tung Oil - http://amzn.to/2CNfXSp
• Tung Oil - http://go.magik.ly/ml/8vke/
• Utility Knife - http://amzn.to/2zdhBLq
• Mechanical Pencil - http://amzn.to/2BcxZgx
• Graph Paper - http://amzn.to/2iFVEOF

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My Amazon Shop: https://www.amazon.com/shop/worksbysolo

Doug Stith's Make:article: https://makezine.com/projects/rumble-bots/

Bob Knetzger's Hog Hollar Make: article: http://makezine.com/2014/11/04/how-to-get-your-toy-made/

Bob Knetzger's info at Make: http://makezine.com/author/bob-knetzger/

Doug Stith's YouTube channel: https://www.youtube.com/user/Stithsonian

Doug Stith's web site: http://www.stithsonianscience.com/about.html

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