Good Riddles

 
Riddle #27 (medium)

Question: What jumps when it walks and sits when it stands?

Question: What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Riddle #35 (medium)

Question: When you need me, you throw me away. But when you're done with me, you bring me back.

What am I?

Question: Many have heard me, but nobody has seen me, and I will not speak back until spoken to.What am I?

Riddle #43 (medium)

Question: I am taken from a mine, and shut up in a wooden case, from which I am never released, and yet I am used by almost everybody.

What am I?