Jelle makes a new sand marble run with Dumpert!

Last saturday 14 may, i went to the “Klimduin” (climbing dune) at Schoorl (a town near Alkmaar, Netherlands) with people from Dumpert to make a new sand marble rally. However, the dry sand (after a long period of dry wetter), the wind and playing children, it was not easy to make a good track. Read more…  .

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