Dad try to teach the prime graphically, it become a pretty square or not. Fumi proposed, A pretty square is aligned. 1 is not the prime, because it become a pretty square.

1. Number fun
Jan. 31, 2015
Fumi: Fumika Hoshino
Dad: Toshio Hoshino
Translator: Dr. Kiyoshi Ogawa
@kaizen_nagoya15/03/18

2. About Author
Fumi: Fumika Hoshino:星野(star field)
Dad: Toshio Hoshino:星野(star field)
星(star) become 日(sun) 生(born)
野(field) become 里(village) 予(in
advance)
@kaizen_nagoya15/03/18

3. At beggining
I love number very
much.
Today, Dad teach
me very interest
numbers.@kaizen_nagoya15/03/18

4. Dialogue
Dad "Fumi, do you like
marble?"
Fumi "Too hard to eat."
Dad "Why Ya"
"Not to eat”
@kaizen_nagoya15/03/18

5. Story
Dad try to teach the prime
graphically, it become a pretty
square or not.
Fumi proposed,
A pretty square is aligned.
1 is not the prime, because it
become a pretty square.
@kaizen_nagoya15/03/18

6. Finally
Fumi understand
what is the prime
and how could she
decide a number is
the prime or not.
@kaizen_nagoya15/03/18