As a child, go to the Spirit Temple. Go up the stairs and turn right to see water gushing through the floor. Walk up to it and go all the way left. Then, go straight into it. When you get to the top, do a sword jump attack. You will hit the wall and bounce up to the top of the water. Next, go left or right to fall off the Spirit Temple. After a little while, Link will appear at the beginning again. Also, after you are up on top of the water, you can go forward to enter a few rooms you are supposed to enter as an adult. However, when you try to get back, you will be stopped by the wall; cast Farore's Wind before doing this trick. Do not do this as an adult. Doing so may cause your game to freeze, or you may die.