Answer:
I am a ship that can be made to ride the greatest waves. I am not built by objects, but built by minds. What am I?
I have three feet but I cannot walk. What am I?
I go up and down at the same time. Up towards to sky and down towards the ground
You can catch me but cannot throw me. What am I?
What has to be broken before you can use it?
When is it bad luck to see a black cat?