When I was in 7th grade I had to look up "cartoons" for an art project. Using Google's image search (with safe search on) returned results that WERE NOT even drawings of obscene things! We're talking about photographs here people.
Keep in mind I was in the middle of a high school computer lab with the principal walking around the room!
Its Rsr here again and for you people saying things about google has adult content and safe search doesnt block it, you can literally search porn and google will block the whole page so there is no possible way for anything to bypass it if nothing shows up. and if you don't search anything adult related you probably wont get any. And if your children are searching bad stuff, you need to sit down and have a talk and tell them not to, you need to stop blaming google.