One of the reasons why Harri is so fascinated by heaven is because his idea of heaven is such a significant contrast to his current life on Earth. In the mortal world, Harri’s life is full of change: he has moved to a new country, he is approaching puberty, and his neighborhood is gripped by a tragic murder. As a result, he is intrigued by questions such as whether babies grow up in heaven. His question also shows his innocence, as he’s worried if dead babies have to be babies forever, not if dead babies go to hell.