Answer:
I walk on 4 legs in the morning 2 legs at noon and 3 legs at night.
I tremble at each breath of air, and yet can heaviest burdens bear. What am I?
I can fall off a building and live, but in water I will die. What am I?
What is deaf, dumb, and blind, but always tells the truth?
I am an instrument you can hear but cannot touch or see. What am I?
Runs over fields and woods all day. Under the bed at night sits not alone, With long tongue hanging out, Resting at your feet until we go for a walk