Plagiarism - is when we copy another person's ideas and pretend like we came up with it all by ourselves. This is something that is against the law, and something we will never be able to do, even when we are older. There are different types of plagiarism. A few are, Direct plagiarism, self plagiarism, mosaic plagiarism, and accidental plagiarism. But, all of them are wrong. 

Some ways that you can avoid plagiarism is by citing, and paraphrasing. Being aware of others words and not trying to steal them is a great way to avoid plagiarism. 

For more Info:

https://kids.kiddle.co/Plagiarism

https://www.varsitytutors.com/blog/how+to+explain+plagiarism+to+your+elementary+student