Answer:
I go in hard, come out soft. Blow me hard and I'll make a pop. What am I?
What three letters change a boy into a man?
My seas have no water, my mountains have no rock, and my land has no grass. What am I?
What has feet and legs, and nothing else?
I am a sound made by felines when petted.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.