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This is a well-made product. It requires specific directions for children's use, as there is a 'right' way to position the beads for successful construction. There is, however, a limit on the number of 3-D objects which can be made, as the holes do not allow for pyramid structures. This might have been a preferable addition to the curved pieces which might, erroneously, give an impression of precise numbers of vertices on cylinders, circles, spheres, etc.