Fullmetal Alchemist by Hiromu Arakawa

In this story the main characters are a boy around 15 to 16 years old with long blond braided hair fitted with auto-mail limbs and a red coat and his younger brother whose body is an empty suit of armor. They are traveling to find the legendary Philosopher stone, the stone of immortality, in order to get their bodies back. I would give this series 10 stars.  

~Angelyna