8 identical wedges repeat around the centre, across 3 concentric rings, giving 65 separate shapes to fill. At a relaxed pace that is roughly 49 minutes of colouring.
The pattern is built inside a circle, the traditional mandala outline.
Lines are thick and the shapes correspondingly large, which is what crayons and young hands need: a shape has to be big enough to fill without going outside the line.
Every outline is a closed loop. On paper a broken line reads as a mistake rather than a boundary; colouring digitally, a fill tool escapes through any gap and floods the page.