Okay, I just entered the woods in Ordon running after the kids. I got the lantern, went though the cave, and now I'm in this clearing with Moblins, Keese, and Deku Babas. I went to the gate to read the sign. This is what it said:
"Forest Temple Ahead. Make sure to fill up on lantern oil!"
Something like that. Anyway, I was really excited to be at the first dungeon. But there's a lock... Where do I get the key?