We ended up not going skiing this last weekend, which means I finally had time to follow up and develop some origami ideas I started exploring in Bogota. I’ve been doing a series of single-sheet polyhedra based on an icosahedron from a sheet of hexagon paper, using a triangle grid. The first step was to figure out how to lay the faces of the finished form into the unfolded sheet so that you’d end up with the right amount of paper at the edges to form a good lock. Then I tried folding a few times, trying out a few variations to get good at it. The most successful so far is a Dimpled Icosahedron. This is a fascinating shape, and a good, strong model that holds together well and can even stand being thrown around. More coming soon, so watch this space!