Name it, then count its sides.
Shape Safari goes past simple shape naming into shape properties: how many sides a shape has, how many corners, and which shape fits a description. Knowing that a hexagon is the one with six sides rather than the flat one is what makes shape knowledge useful later in geometry.
The 2-4 level sticks to the four basic shapes, circle, square, triangle and rectangle, and asks only for names, drawn at the largest size on screen.