I'm abit late watching this anime, but this is quite good, on episode 3 and it really makes me feel nostalgic of when I was a child. I admit I used to think I was a super saiyan... Shooting kamehameha from the top of the stairs downwards. I feel embarrassed watching some parts but its rather entertaining.
*update*
Having watched up to the penultimate episode, this anime is well worth me staying up all night.
Emotionally, I feel that yes people may outgrow these old ways, but we all miss the feeling of having fun and being creative and imaginative, of course with acknowledgment of reality at the back of our heads. But there is no justifiable reason to exile these feelings. Sure sometimes reality hits hard but think about it another light, than the one everyone can see from. An example would be from the Japanese movie 'Departed' in comparison. Tl;dr emotions portrayed are that of coping with hardships.