Sand Marble Race 2017 Marathon: All races! | YouTube

A great YouTube video: Sand Marble Race 2017 Marathon: All races!

All Sand Marble Races of the 2017 tournament in one long video including the qualification!

In the qualification, 5 groups of 7 marbles each will race for the best 4 places to qualify for the main tournament which consists 13 races on 7 different course layouts.

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