Bought as a teacher of my classes this set. The idea and the value for money I feel is still as good, but needs to be said very clearly that in many (!) The display was not correct. Instead of going to the north, the compass needle has often shown to the west or east. They often had to beat a bit on the compass so that it rotates properly. This is obviously for use in the classroom unusable if it comes that students independently discover the compass and its functioning.
