Answer:
What time of day, when written in capital letters, is the same forwards, backwards, and upside down?
You can do this with your friends. You can do this with your nose. But don't do it with your friend's nose!
I occur twice in eternity. And I'm always within sight.
Used to keep prisoners silent and to make temporary repairs on cars.
Whatβs full of holes but still holds water?
Which popular cheese is made backwards?