Abstract: The doll with simulated hair and nail growth includes a doll head with adjustable length hair simulating hair growth, and at least one doll hand having adjustable length fingernails, simulating nail growth. The simulated hair and nail growth are each metered, allowing the doll to be used for educational purposes to show growth of a certain length within a particular period of time. The doll head includes an internal axle, about which simulated hair fibers are wound. Selective rotation of the axle, driven by selective rotation of a knob with metered indicia, allows the apparent length of the simulated hair fibers to be adjusted in a controlled and metered fashion. The doll hand is provided with an internal sliding cartridge with simulated fingernails. Sliding of the cartridge, also in a controlled and metered fashion, allows for adjustable extension of the fingernails from fingers of the doll hand.