Dragon Ball does teach some lessons for kids in that regard.>Hunt for the Dragon Balls
Don't use sexual rewards as incentive if you don't want to be preyed upon and sometimes the journey was more important than the destination.>21st Tenkaichi Budokai
It's good to step back and relax once in a while, don't become overconfident just because you're arbitrarily deemed the best.>Red Ribbon Army
There's never always a big shortcut to get you past the hardships of life. Using your resolve to get yourself past that hardship is where the real reward is.>22nd Tenkaichi Budokai
You aren't your mentor/parent. You are you, and your life is what you make of it.
There is also a smaller idea about constantly improving yourself that is at one of its more blatant points here, with Goku's tail training.>Piccolo Daimao
Becoming blinded by intense emotions leads to your own ruin.>23rd Tenkaichi Budokai
Don't expect God to be the answer to all your concerns.>Saiyajin Arc
Your heritage doesn't dictate who you will be. Even the lowest of the low can rise up and challenge a king.>Namek Arc
Fighting for what you believe in and the innocent is better than standing around watching.
Don't fuck with the Aryan race.>Artificial Humans Arc
Don't put all your faith in technology to do the job for you. Gero literally made a shitton of artificial humans to kill Goku, and the only ones that even try to accomplish this are the ones that were the most disobedient, and even then they're doing it because they have nothing better to do.>Buu Arc
If you're a faggot you get all the girls.