Funny toy

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Der Kohlenwagen (the coal wagon) an antique toy (1905)
http://www.kugelbahn.ch/coalcar.htm

[Stewart]

Not just a toy...

http://en.wikipedia.org/wiki/Funicular

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in France we have one for the boats near Strasbourg (just a buckle of water and it works!). and It's forbiden to pee outside during the travel (dont disturb the unbalance)
http://fr.wikipedia.org/wiki/Plan_incli ... -Arzviller
unfortunately only in french...