Children in assembly blocks、 exercise their flexibility、 hand eye coordination、 hands and brain and make them feel sensitive、 learning to lay a good foundation for the future. Let children win at the starting lineThe number of blocks of: 163 piecesMaterial: non-toxic ABS (3C authentication)Net Weight: about 200gColour: As pictureDimension: 18cm*6cm(7.09"*2.36")Assembly Methods: Items comes with color manual、 DIY according to the diagrams.PS:The children under 6 years old should be guided by parents when playing because there are some small parts which can be swallowed by little childrenQuantity: Building Blocks set*1 (without original box)