Temple of time

Do: Enter the sacred realem
Get: Master sword, light medallion, extra wisdom
Meet: Sheik, Rauru

From the temple entrance, walk straight, and stand on the red carpet infront of the stone alter. While you stand on it, play the song of time with your brand new ocarina, to make the spiritual stones come out and place thamselves on the ater. It will also light up the triforce and open the sacred realem. Go through the door and walk up to the pedestal. Pull the master sword and start the triforce.

After you do this, a really cool, and long cinama will take place. That is not all, you will become an adult. This is an awesome privilage, and as the game progresses, it will be even awesomer.