The cartoon is a Japanese animation cartoon. It has a lot of martial arts in it. It is fun to watch the characters fight and see the moves that they do. They shoot fireballs and energy blasts. The main characters are Vegeta who is a sayjin, Goku who is also a sayjin but lived on earth since he was a kid. There is Gohan who is Goku's son and chi chi is his mom. Bulma is a friend of Goku's that he has known since he was a child. Dragon Ball Z is a cartoon that all age groups like because the characters, setting and plot are very entertaining.
The characters can relate to the watcher, that is why all age groups enjoy watching Dragon Ball Z. The reason why the viewer can relate to the characters is because each character has their own persona. You have the proud but cocky character Vegeta, who takes pride in every thing that he does, is proud of his sayjin race and doesn't back down from no one. There is chi chi who is the strong proud women who doesn't take crap from her husband. Goku is the character who is very easy going, simple-minded and sees the good in everyone. Gohan is the child in the cartoon. He is always trying to be just like his dad, make his dad proud and be like the older adult characters in the cartoon. Bulma is the smart girl with an attitude. She helps the other characters in the cartoon with devices like the dragon ball radar, that helps the characters find the dragon balls. She also has a lot of gizmos that she uses to. So you see they have a character that almost anyone can relate to; no matter what age they are.
The cartoon takes place in the future, which makes you want to watch it to see what their perception is on the future. This type of setting makes the viewer young or old want to watch it. The setting also takes place in outer space for some episodes. They usually get their bye space ship. The planet they go to in outer space is called planet Namek.