New here, but can't help to share:-)

DS4 got up one morning as asked me, what numbers 11 can be divided??
I answered: "only 1 and itself, and nothing esle"
"What about 12?"
"Not only 1 and itself, but also 2,3,4,6"
Then DS started to look for numbers only divied by 1 and itself,even he didn't know we call them "prime number"
Soon he figured out most prime numbers within 100.
Later afternoon, he asked me:
"Mum, is One prime number too?"
"Probably not"
" got me, I don't know."