Masturbating when you are young

I know this is soooo weird and this is out of my comfort zone but I need to ask. I’m 13, obviously can’t but any toys without my parents realizing it. I’ve heard people like using electric toothbrushes but I can never...you know fit it in. I’ve used a hairbrush but I don’t have any big ones that don’t have rubber grips. I was wondering if anyone could give me any advice on what to use/do?