even if you were a little kid?
Keep in mind I'm not advocating we castrate him and stick him on a chain gang.
If he is 8 or under, he should get SOME slack. May be scare him a bit, and make sure he realizes just how bad things got because he wanted to play with matches.
If he's at least 10 years old, make him do community service every weekend but holidays until he's 21 (unless he gets a job that requires working on weekends), take away driving privileges until 21, and require that when he turn 16 he get a job and have 20% of his wages garnished until he's 21. And he'll be required to keep his grades up and graduate high school. If he keeps it all up, or shows he's committed, then those terms can be backed down and maybe even offer him a decent bit of financial help for college/university.
One thing you don't realize is there, if you are a kid, and you watch tv for 2 hours a week (most likely saturday morning cartoons), you'll have seen all the adds on tv telling you not to fuck with matches or play with fire. Unless he was 4, he knew better.
Also, as people stated, he could have called for help and notified the fire department when the fire was very little. But he didn't. He thought "oh my, I started a fire, should I face the consequences of being grounded for playing with fire and put my parents through a lot of trouble and expenses? or should I let it go and let everyone think that it's just another one of those bush fires?" He only admitted it because the guilt got to him.
That's not commendable, especially if people were hurt because of the fire.
That is why he doesn't deserve to get off for "coming clean" he didn't do shit but perhaps stomp on it or grab a bucket of water to stop it. Had he called the fire department, went to his parents and got them to get a hose... anything, then I might be with Ice on this. I'd be surprised to find out he didn't come clean until he heard the fire department figured out it was the matches. At which point he just went "oh shit, I should say something now, to avoid getting into more trouble than I already am." That shit didn't work for me as a kid, shouldn't work now.
We are too lenient on kids these days now.
The fire in San Diego was just happening that same day, it's quite possible he didn't know about them.