Lego has always been the number one for many children. That is due to the fact that they can create endless shapes according to their desires, which will fill them with a sense of accomplishment. We strongly recommend this set of LEGO-style that is even more interesting of advanced mechanical masters(non-Lego brand). It includes N multi-physics knowledge and like kind of a general encyclopedia. If these interesting linkage mechanical shapes can be made by children themselves , I believe they will be cheerful and inspire infinite curiosity about this knowledge.