I don't have a dd yet, but I've thought about this a lot. If it were me, I'd prolly start her on cloth pads, because those are the least invasive and easiest to use. For something internal, if she wanted to swim, I'd go with sea sponges, because they're so soft. When she got older, maybe she'd like a Keeper or something. I started using the Keeper when I was a virgin, so I know it can be done. But I was quite comfortable with my body at that point. Maybe she'd also like a piece of jewelry, red, maybe a small ruby? Most girls I know wouldn't like a party or anything, but maybe a special dinner with mom and a friend? Jade and Pearl has a menarche gift set.