What am I?

If you drop me I’m sure to crack but give me a smile and i’ll always smile back. What am i?

Never resting, never still, Silently moving from hill to hill, I do not walk, run or trot, But all is cool where I am not. What am I?

I defend without weapons, stand without legs, wound without force, and I am harder to fight than to kill. What am I?

I tell people to be careful when handling boxes. What am I?

Riddles and Answers