Answer:
This is the main ingredient in spaghetti and Mac-ยญN-ยญCheese.
It's what light turns into in the night
I am the yellow hem of the sea's blue skirt.
He's small but he can climb a tower.
What occurs once in a minute, twice in a moment and never in one thousand years?
What is big and yellow and comes in the morning, to brighten mom's day?