Answer:
If you drop me, I'm sure to crack. Give me a smile and I'll always smile back. What am I?
You hold my tail while I fish for you. What am I?
I am a mini solar powered computer.
People see through me, but none pass through without killing me. I can be anywhere, and can be seen double or single. What am I?
I walk on 4 legs in the morning 2 legs at noon and 3 legs at night.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.