Answer:
I am a key that is playful. What am I?
Iām hard as a rock and as light as a feather. Iām passed on to one another. Poor people need me and rich people have me.
I am so delicate that even mentioning me breaks me. What am I?
I begin and have no end and I end all that begins. What am I?
I am rubber you can eat!
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.