Line-art schematic of a hand-cranked dancing doll mechanism with labeled parts like crank wheel and hand crank.

Simple line-art schematic of a hand-cranked dancing doll mechanism. A rectangular box showing the internal mechanism. Inside the box, a central horizontal shaft with a hand crank extending outside. A circular crank wheel is attached to the shaft. The wheel has two pins: one above the center and one below the center. Two thin rods connect the pins to the doll’s left and right arms. The rods move opposite each other: when the left arm goes up, the right arm goes down, and vice versa. The doll is above the box, with arms pivoting up and down. Style: clear, educational, minimal, black lines on white background, labeled for a school project. See more