How to train your Dragon
The story takes place in a mythical Viking world where a young Viking teenager named Hiccup aspires to follow his tribe's tradition of becoming a dragon slayer.
After finally capturing his first dragon, and with his chance at at last gaining the tribe's acceptance, he finds that he no longer wants to kill it and instead befriends it.
Tuffnut and Ruffnut Thorston, a pair of quarrelsome twins.