@ella_j_heart, haha I like that idea

It’s funny you said snack. That’s how I got her to finally stop. I gave her some cheese. I think it’s just her being tired because it’s usually around nap time or bed time. It just drives me insane. Her little brother cries and clings to me when she does it because I guess it scares him and my youngest cries because her screaming is so loud. I just can’t think straight when she does it

She may be asking for more attention from you. I know it’s hard to give individual attention to each child when you have multiple, but try to do something small every day with just you and her just to make her feel special. Wether it’s a game, coloring together, or imaginative play etc.
Also, I’ve learned that most tantrums are from being sleepy or hungry. So just make sure she is getting a good nights sleep and nap and has snacks in between meals to hold her over.