Answer:
Break it and it is better, immediately set and harder to break again
A man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?
When it is alive we sing, when it is dead we clap our hands. What is it?
When you stop and look, you can always see me. If you try to touch, you cannot feel me. I cannot move, but as you near me, I will move away from you.
When young, I am sweet in the sun. When middle-aged, I make you gay. When old, I am valued more than ever.
You use it between your head and your toes, the more it works the thinner it grows.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?