8- 16 years old. Happy Rubik's Cube Composition is an organization specializing in extracurricular science and technology education for children aged 8- 16. Relying on the Chinese curriculum education in primary schools, the school adopts 4C teaching mode, so that children can fully experience the fun of learning by doing and playing with it in interesting and challenging classes. Through hands-on practice, children's logical thinking ability, imagination and creativity, ability to analyze and solve problems, and persistence, self-confidence and concentration are cultivated.