Wren, my girls are a little older than yours (8 & 10). I think that you should stick to your guns. I have limited our kids to wearing makeup for performances (dance and theatre). I do allow them to get make up at parties if that is the theme but make it clear that it is just for parties. I do let them play with body crayons but these tend to be used more for drawing pictures like face paints. Over the years, I have prohibited certain toys that I found offensive, like the Brats dolls that were popular a few years ago. I've always explained my reasons to them, i.e. the Brats dress like prostitutes. We've also had lots of discussions about tattoos and body piercing (Don't you think that "Tempting" tattoo will seem silly when she's 80?) we've talked about how ridiculous it is for some people in their classes to be "dating" at this point. I have told them that I don't know anyone who married someone who they met in high school, let alone grade school. My girls still think that boys are gross and squeal with disgust if there is even chaste kissing in a movie. Have my boundaries helped with this? who knows but I have no regrets.