Riddles

What has to be broken before you can use it?

I'm tall when I'm young and short when I'm old. What am I?

What month of the year has 28 days?

What is always in front of you but can't be seen?

I have branches, but no fruit, trunk or leaves. What am I?

David's parents have three sons: Snap, Crackle then what is the name of the third son?

Where does today come before yesterday?

What goes up and down but never moves?

I am an odd number. Take away a letter, and I become even. What number am I?

What is so fragile that saying its name breaks it?