nah,i came up with different way to make him train

Teach him to dragon shout, like in Skyrim

he's hates fire

if he wants to rap, teach him attack that come from this mouth, while he is rapping he can shoot fir out his mouth!

then how can i make him practice if he constantly wants to rap,and i can't help him to learn to Multi-task,it's hard

if u want him to listen do what he want's like if he want's to go to the park, make him practice balance by standing on monkey bars