Which weighs more, a pound of feathers or a pound of bricks?

I have keys but no locks, space but no room. What am I?

What has many teeth but never eats?

What goes up white and comes down yellow and white?

A rooster lays an egg on top of a barn roof. Which way does it roll?

How can you drop an egg on a concrete floor without cracking it?

A boy has as many sisters as brothers, but each sister has only half as many sisters as brothers. How many brothers and sisters are there?