Death Mountain Trail and Goron City
Go back to kakoriko village and now its time to go to Death Mountain Trail. You'll see spider things that will jump on you. you can kill them if you like otherwise just dodge them. Go to Goron city and go to the first floor. play Zelda's lullaby while standing on the soft carpet. the door will open and go in and you'll see Darunia, the king of the Gorons. Talk to him and then play Saria's song in front of him, he'll dance like crazy and give you the Goron's bracelet which can pick up bomb flowers with. You can also explore Goron city if you want. To get into Dodongos cavern, get out of Goron City and turn left and you'll see a bomb flower in a half fence. pick that up and throw it in front of the boulder and it will blow up. Go down there and enter Dodongos Carvern.