Introduction of Happy Planet Old urchin

1. Old urchin: A character in the Happy Planet series, who lives on a happy planet and cares about children.

2. He leads the children who are civil servants on the happy planet-the first polyhedron (small inventor), Lotus Rongbao (polyhedron's assistant) and Ice Lemon (polyhedron's assistant); The second part, Little Pudding (alias Ike, little inventor), Cher (alias Ai Xue, Ike's assistant), Benben (Ike's assistant) and Congcong (Ike's assistant); The stick (the little inventor) and the firewall (the assistant of the stick) in the third and fourth parts; In the fifth part, Mantianxing (an old urchin's assistant, a small inventor), hyacinthus orientalis (an old urchin's assistant), Duoduo (an old urchin's assistant) and Gravitational Wave (an old urchin's assistant) complete the research on a subject every year.

Happy Planet people recommend an old scientist with rich social work experience as their elder. The elder is neither a leader nor a ruler, nor a symbolic or ceremonial head of state. He is more like a sage of Confucius and Mencius in the Spring and Autumn Period-a teacher respected by everyone. He influenced people with his own thoughts, thus maintaining social order. The current elder of Happy Planet is an interdisciplinary scientist, and he is called "grandpa the old urchin".