Worlds Finest Permanent Cosmetic/Tattoo Practice Aides. Created out of necessity for the industry over the course of 18 months of R&D. Most practice aides are doll like material and are not 3D. Our practice Aides at LLMC will give you a near life like experience. The materials used are as close to life like as they can possibly be. Please like us on Face book and follow us on Twitter.