So the LORD asked him, "What are you holding?" "A walking stick," he answered.

"If the king demands that you prove yourselves by performing a miracle, tell Aaron to take his walking stick and throw it down in front of the king, and it will turn into a snake."

The LORD said to Moses, "Tell Aaron to take his stick and hold it out over all the rivers, canals, and pools in Egypt. The water will become blood, and all over the land there will be blood, even in the wooden tubs and stone jars."

God purposely chose what the world considers nonsense in order to shame the wise, and he chose what the world considers weak in order to shame the powerful.