the famous cube

This is a fabulous game interesting for the spirit of adutles and children.
I do not understand why it is so expensive. I played child and I doubt that his price has then been the order of 100 francs or I do auri ever had.
The intelligence of our toddlers is more expensive than ours to win? It is only a shame because I am a teacher and my n risers them, not at all afford this gem ...