This beautiful model to cut out and glue together has twelve sharp spikes emerging from pentagonal cups and forming ten pairs of parallel planes, each in a different colour.

None of these ten colours occurs more than once on any spike or cup.

When completed, the polyhedron rests on a horizontal surface on just three spikes.

The book contains everything you need to make the model, excepting cutting and glueing materials. With a little patience a wonderful model emerges!