You need 280 rods, and 14 square panels for this challenge: * Build a few "Siamese Dodecahedra". They take 18 rods each. A fast way to build then is to make two pairs of two linked triangles, and set one on the table. Then take eight rods all joined together and "stitch" them onto the edges of the diamond on the desk. Then drop the other diamond onto the waiting structure. * Build a few square-based pyramids. Link several of the square based pypamids together by their square bases, turn the chain on its side, and push them into an arc. --Karl Horton 20:02, 16 July 2007 (UTC)