Okay, so Vojvodina is a place where many people live. These people are different from each other in some ways, like their culture, language, and traditions. We call these groups of people "ethnic groups."
There are many ethnic groups in Vojvodina, but some of the most important ones are:
1. Serbs - These are people who speak Serbian and follow Serbian traditions. They have been living in Vojvodina for a very long time.
2. Hungarians - These are people who speak Hungarian and follow Hungarian traditions. They came to Vojvodina a long time ago and have been living there ever since.
3. Romanians - These are people who speak Romanian and follow Romanian traditions. They also came to Vojvodina a long time ago.
4. Slovaks - These are people who speak Slovak and follow Slovak traditions. They came to Vojvodina a long time ago as well.
5. Croats - These are people who speak Croatian and follow Croatian traditions. They also came to Vojvodina a long time ago.
There are many other ethnic groups in Vojvodina too, like Bulgarians and Ruthenians, but these five are the most important ones.
Even though these people are from different ethnic groups, they all live in Vojvodina together and try to get along with each other. They even celebrate each other's holidays sometimes!