Answer:
Break me and I am better, immediately set and harder to be broken again. What am I?
You can see me in water, but I never get wet. What am I?
I am a rock group with four members all of whom died in plane crashes. Who am I?
Never ahead, ever behind, yet flying swiftly past; for a child, I last forever; for an adult, I'm gone too fast. What am I?
I walk on 4 legs in the morning, 2 legs at noon, and 3 legs at night. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.