Riddle: What starts with an ‘e’, ends with an ‘e’, but only has one letter inside it?
There is a good pun right there. I know it when I see one! This just compels you to think, doesn’t it? The question is framed as if we are looking for a word that is 3 letters long and it has to start with an “E” and end with one.
However, the letter has another meaning too! And thinking of those other meanings of a word might be the key to solve a riddle. A letter is something that you write and place in an envelope. At least in the old days…
Answer: An envelope!