Answer:
If you drop me, I'm sure to crack. Give me a smile and I'll always smile back. What am I?
Part carbon part water I am poison to the fishes. Many falsely claim my name I am the pause that refreshes.
Die without me, never thank me. Walk right through me, never feel me. Always watching, never speaking. Always lurking, never seen. What am I?
I look like a tiny trombone
I have two body parts but am used to measure length. What am I?
A little house full of meat, no door to go in and eat.