What Am I Riddles

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

Question: Some use me, while others do not.
Some remember, while others have forgot.
For profit and gain I'm used expertly, I can't be picked off the ground or tossed in the sea.
Only gained through patience and time, can you unravel my rhyme?

Question: I go into the water red and come out black.

What am I?

Question: What belongs to you but others use it more than you do?

Question: You put me in hard.
But then I become soft.
Blow me hard and I will get bigger.

What am I?