This is an unassembled product, and the assembly is fun. The parts come apart, so you can play with various combinations. Even children have surprisingly strong strength. Let's have fun playing, from children to adults! Recommended as a gift for children and grandchildren, for Christmas, birthdays, entrance/graduation/school entrance celebrations, and other presents. This is a time when the movement of fingertips rapidly progresses, so please play using your fingertips a lot. Observation skills will develop, and pretend play will become more fun. Made of high-quality ABS resin, it is safe, non-toxic, and odorless, and has excellent durability, so children can use it safely. Concentration, logical thinking, and construction skills. These blocks cultivate the ability to think while playing! For small hands that are not yet accustomed to firmly grasping objects, the moderate weight is helpful for training fingertips and hands. 19