c is the second box that I purchased to complete the first (but different box geomag tj) c is good, fun, boring ... but in some cases simply a box to be able to build and having fun ... even with 2 boxes c is far from being sufficiently ventilated (we will not realize but 100 pieces + 1 other different box c is very little with this game) no instructions but my children 8 years and 6.5 years arrive well to make the buildings (houses, geometric shapes, towers ...) finally c is good but a bit expensive qd mm