Riddle: I'm a type of dough that's always on the go, I flip…

Riddle

i-am-hard-before-cooked-yet-soft-after-gaining-flavor

Riddle

i-have-keys-that-open-no-locks-i-have-space-but-no-room

Riddle

what-can-travel-the-world-while-staying-in-a-corner

Riddle

what-has-keys-but-cant-open-locks-sails-without-wind

Riddle

i-am-the-only-food-that-you-throw-away-the-outside-cook