The big-headed son who has the dream of aerospace meets a special "alien friend" by chance. The big-headed son and the marshmallow's sister team up to participate in the Little Astronaut Project and jointly challenge the four-level space mission. Can they win the competition?
Part of
Includes: New Happy Dad and Son 1: Secret plans, New Happy Dad and Son 2: The Instant Genius, 新大头儿子和小头爸爸传奇兜兜, New Happy Dad and Son 3: Adventure in Russia, New Happy Dad And Son 4：Perfect Dad, New Happy Dad and Son 5：My Alive Friends, New Happy Dad and Son 6 :Shrunk
