The single breast test simulator has been designed for use in education in the prevention of breast cancer and breast self-examination. Breast self-examination is an important way to detect cancer at an early, easier-to-treat stage. The soft, realistic simulated breast tissue fits on a solid base with profiled ribs. Interchangeable papules and nodules of various sizes, shapes and densities can be placed in the breast in any combination, offering a full educational experience.