What are some good anime shows appropriate for 13 year olds?!?!?!?!?

One Piece
Rave Master
History's Strongest Disciple Kenichi
Law of Ueki
Zatch Bell
Get Backers
Fullmetal Alchemist
Prince of Tennis
Bleach
Naruto
Hunter X Hunter
Eyeshield 21
Major
InuYasha
Shaman King

Here are some anime and their age groups. this will give you an idea your type of anime based on your age type:

Air Gear - 16 up
Basalisk - 17 up
Black Cat - 16 up
Bleach - 13 up
Chobits - 16 up
Chrono Crusade - 13 up
Cowboy Bebop - 13 up
Cased Closed - 13 up
Dragon Drive - 10 up
D N Angel - 13 up
Elemental Gelade - 13 up
Elfen Lied - 17 up
Eureka 7 - 13 up
FLCL - 13 up
Fruits Basket - 13 up
Fushigi Yugi - 13 up
Fullmetal Alchemist - 13 up
Full Metal Panic - 13 up
Gantz - 17 up
GetBackers - 16 up
Ghost in the Shell - 13 up
Gundam Seed - 13 up
Gundam Seed Destiny - 13 up
.hack/sign - 13 up
Hellsing - 16 up
Inuyasha - 13 up
Kiddy Grade - 13 up
Kikaider - 13 up
Knights of the Zodiac - 10 or 13 up
Love Hina - 16 up
Mahoromatic - 16 up
MAR - 13 up
Moon Phase - 13 up
Mythical Detective Loki Ragnarok - 13 up
Naruto - 13 up
Negima - 16 up
Neon Genesis Evangelion - 13 up
One Piece - 10 up
Peacemaker - 16 up
Rahxephon - 16 up
Ranma ½ - 16 up
Read Or Die - 13 up
Rurouni Kenshin - 13 up
Saiyuki - 16 up
Samurai Shamploo - 13 up
Scryed - 13 up
Shaman Kng - 10 up
Slayers - 13 up
This Ugly Yet Beautiful World - 17 up
Those Who Hunt Elves - 13 up
Tsubasa Chronicles - 13 up
Trinity Blood - 16 up
Wolfs Rain - 16 up
X - 16 up
Yu Yu Hakusho - 13 up
Zatch Bell - 10 up

Full Metal Alchemist is not appropriate for 13 year olds. Why not recommend Ghost in the Shell and Shikabane Hime while you're at it.

Shows on Adult Swim that preface themselves "TV-MA" usually aren't 13 year old material.

Any Shonen would be pretty safe:
-Bleach
-Naruto
-One Piece
-Yu Yu Hakusho
-Shaman King
-Rave Master

http://en.wikipedia.org/wiki/Shōnen_manga

That's geared towords young males.

Geared towards young females would be "Shojo", which you could google search.
I guess that'd be like:
-Kirby

dunno

CartoonNetwork?

Ouran High School Host Club
Fruits Basket
Special A

that's all I have on the top of my head right now...XD

Okay:

Hikaru No Go
Shamen King
Dragon Ball Z/Dragon Ball/ Dragon Ball GT
Bleach
Naruto
Full Metal Alchamest
- Teen titans
-Digimon
-Rosario+Vampire

A lot depends on what kind of style you like. Action, Fantasy, Romance

There are some romance ones like
Ouran Host Club and Fruits Basket

Sonic X, Dinosaur King, etc.