Answer:
I have all the knowledge you have. But I am so small that I can fit into your hands. What am I?
I have wheels and flies yet I am not an aircraft.
I begin and have no end. Eventually I will be the end of all that has begun.
I am a mountain at night, meadow at day. What am I?
I am in the middle of water but am not an island.
I flow from the Homerβs mouth when he sees doughnuts.