Pictures:

What 5 letter word becomes shorter when you add 2 letters to it?

The word 'short'.

988

What starts with P and ends with E and has thousands of letters.

Post Office.

956

What do you call shoes made of banana peels?

A pair of slippers.

970

What invention lets you look through a wall?

A window.

960

If you threw a white stone into the Red Sea, what would it become?

Wet.

994