Abstract: A toppling domino is disclosed, featuring a rectangular front and rear face with rounded edges and a tapered side profile-such as trapezoidal, triangular, or wedge-shaped—to enhance balance and reduce unintended tipping. The base is wider and heavier than the top, with an optional internal weight positioned near the base to lower the center of gravity. One surface may include textured features to improve grip, stackability, or accessibility. The shape enables modular stacking, allowing dominoes to form radial, circular, and layered configurations that support continuous and repeatable geometric patterns. The domino may be produced in size and color variants using materials such as biodegradable PLA, wood, or rubber, and may include features for educational grouping or therapeutic use. Optional tactile or sensory-response elements-such as sound, vibration, or color change—can provide feedback for users in special needs or interactive settings.