A simple and economical apparatus for demonstration of geometrical center of gravity of two-dimensional objects, Clear Perspex rod mounted on a base with a suspension screw at the top, 4 clear acrylic laminate – circular, triangular, square and trapezoidal. Each lamina has suspension holes along its periphery. The point of intersection of lines drawn from the point of suspension of 2 or more holes of a lamina gives the center of gravity of that lamina.