Hey, laurabeth, I also put hydrogen peroxide in my hair in 8th grade. My hair was kind of a silvery dark blonde, and I wanted to be blonder. It did work a little bit for me (not as orange as the Sun-In that my friends had used).
My mom was not happy with me, and the solid roots line after a couple months was pretty ugly. After I did it, my mom did take me to get professional highlights, and I haven't stopped getting them since.