That's not true. Jim Henson's work on Sesame Street was aimed to educate children without the benefit of pre-school. The Fraggle Rock project was to inspire understanding in children so that future generations would seek out peaceful solutions to problems. For that, Jim Henson was labeled a children's performer - something he kept trying to break out of. The roots of Jim Henson are actually in graphic design, short film, advertising with puppetry and his Sam & Friends program aimed at an older audience. Sesame Street came later. Jim geared the bulk of his work for a general audience that you are mistaking for a kid's demographic. So, no - his work was not usually aimed at children. I think most Muppet fans understand that.