GLSS huddle

What has to be broken before you can use it?

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

What goes up but never comes down?

What can you hold in your right hand, but not in your left?

16, 06, 68, 88, ?, 98.

What does the "?" mean?

This ancient invention allows people to see through walls. What is it?

What is full of holes but still holds water?

Where does today come before yesterday?