Answer:
What has 13 hearts but no other organs?
My first is in riddle but not in little. My second is in think but not in brink. My third is in thyme but not in time. My fourth is in mother but not in brother. My last is in time but no t in climb.
I was not born but I am here. I have no name but I am given many. I was made by science and life
I can be hairy and itchy all over. I hang on a stick. I can be the scariest thing you have ever seen. I stand in the middle of nowhere.
Flat as a leaf round as a ring. I have two eyes but can't see a thing.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.