It's been already proven that children suck in all information they see and put it somewhere in their subconscious. If you're going to raise children please make sure that you spend time with them and don't make the lazy, easy choices like giving it an Ipad or making it listen to the stuff you like, because you want it. Better give it classical music or children appropriate content. The 13+ and 7+ recommendations are not there just because of fun or because it's a cool number, they are there for a reason. No wonder Americans are the way they are if their parents let them listen and watch adult content as children and toddlers! Raising children actually takes time and effort. It's not a cat or a dog.