I turn around once. What is out will not get in. I turn around again. What is in will not get out. What am I?

Answer: A Key.

More Classic Riddles with answers

More Classic Riddles

I went into the woods and got it. I sat down to seek it. I brought it home with me because I couldn't find it. What is it?
I'm a god, a planet, and measurer of heat. Who am I?
I'm as plain to see as black & white. I prefer to roam about at night. Just don't attack or startle me. Or odiferous emissions may result you see. I'm an omnivore yes it's true. But what's my name tell me do?
I'm in the book, but not on any leaf; I'm in the mouth, but not in lip or teeth; I'm in the atmosphere, but never in the air; I wait on every one, but never on a pair; I am with you wherever you may go; And every thing you do I'm sure to know; Though when you did it I should not be there, Yet when 'twas done, you'd find me in the chair.What am I?
I'm like a doll, But I'm not for playing; I stand up straight, but if windy I may be laying; I'm well-known and famous for having no brain; I work outside both day and night in sunshine or in rain. What am I?
I'm made of eight letters, But hold a ninth inside; Pay a very small fee, And send me for a ride. What am I?
I'm so fast you can't see me, though everyone else can see straight through me. I don't stop until the day you die. What am I?
I'm white, and used for cutting and grinding. When I'm damaged, humans usually remove me or fill me. For most animals I am a useful tool. What am I?
If a dog is tied to a piece of rope that is 6m long, how can he reach a bone that is 7m away?
If a fender cost six dollars, what will a ton of coal come to?
If a man carried my burden he would break his back. I am not rich, but leave silver in my track. What am I?
If a rooster laid a brown egg and a white egg, what kind of chicks would hatch?