Acertijos/Riddles

What letter do you never want to drink?

What three letters can't you say to the invisible man?

I disappear the moment you say my name.What am I?

David’s parents have three sons: Snap, Crackle and......?

hat question can never be answered with a Yes?

What has to be broken before you can use it?

What goes up but never comes back down?

What has many keys, but cannot open a door?

I’m tall when I’m young, and I’m short when I’m old, what am I?

What five-letter word becomes shorter when you add two letters to it?