Brain teasers

I am lighter than air but a million men cannot lift me up, What am I?

A seven letter word containing thousands of letters

A barrel of water weighs 20 pounds. What must you add to it to make it weigh 12 pounds?

What animal would make it to the top of the pineapple tree the fastest?

Who much wood can a woodchuck chuck if a woodchuck could chuck wood?

What table has not a leg to stand on?

What is full of holes, but can still hold a lot of water?

What is big and yellow and comes in the morning, to brighten mom's day?

what kind of trees can you fit in your hand?

There is a clerk at the butcher shop, he is five feet ten inches tall, What does he weigh?