zonnewijzer Windrose 
Materialen: hout en papier
Afmetingen: 75 x 85 x 20 mm 
instructions in Spanish, English, French and German 

How it works:
Put the sundial on an horizontal plane and direct it southwards in such a way that the tip of the compass meets the signaled and coloured "N" on the windrose.
In this positition we will see that the string casts its shadow over the two sundial quadrants showing the real solar time.