paper and pencil for each scout

Good to fill 5 minutes before a meeting starts

Have everyone sit in a big circle. Each scout gets a pencil and piece of paper or index card.
Ask everyone to write a 'WHY' question they always wanted to know the answer to on their card. The weirder, the better. For example, "Why can you taste onion a day after eating it?"
When they are done, have them turn the card over and write an answer on the back. The answer can be nonsense. For example, "Because my dog has fleas."

When finished, collect all the papers. Then, distribute them to everyone randomly.

Starting with one scout, have him read his question. Then, have the scout next to him read his answer.
Continue around the circle, having a scout read his answer to his neighbor's question, then reading his own question.

Some question/answer pairs are complete nonsense, but the occasional ones that make sense or are just plain funny make it work.