Jimmy is such a little bully

My jimmy is such a bully he's constantly crawling over Gianna taking her pacifier or whatever toy she has, or pulling her hair. He doesn't even take a pacifier he's a thumb sucker. It's like you can't get away from me because you can't crawl so I'm going to terrorize you..... it's horrible, she just looks at him and cries. She is going to have to learn to crawl to get away from him.