Hey Hey Mae, To a 6 year old kid that`s a beginner I would say it`s like somebody wants you to play with them another game while you play your favorite game and you don`t like that :))

It means to do smth that distracts another person from his business, or to make him annoyed and irritated. To disturb=to bother. For example, you listen to music very loudly and it disturbs your neighbors, they just can't fall asleep because of your music. Or, another example, your friend does his homework, he is really busy but you disturbs him with different silly questions and he can't do his homework because of you.