You can see it everyday, But cannot touch it at will. What is it?

What English word has three consecutive double letters?

What word is pronounced the same if you take away four of its five letters?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

What has 88 keys?

What runs around the whole yard without moving?

I look at you, you look at me, I raise my right, you raise your left. What am I?

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

There is something which is always coming but never arrives?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?