Answer:
I don't have eyes, but once I did see. Once I had thoughts, but now I'm white and empty. What am I?
Never ahead, ever behind, yet flying swiftly past, for a child, I last forever, for adults, I'm gone too fast.
I do not have eyes but I once could see. I used to have thoughts but now Iām empty.
What can be cracked before it's used?
You cannot keep me until you have given me. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.