Halloween things.... ( age +8)

JOKE ( Chiste)

- How do monsters tell their futures?
- They read their horroscope!

RIDDLE ( Enigma)

I was made* by a crazy scientist. He used everyday objects to give me ears. When people see me they scream*. Perhaps it is because my skin is green!
Who am I?

(HELP: Mary Shelley wrote about me.)
Lexis:
was made by- fui creado por;
scream-chillar