A great gift for the technical hobbyist. What happens when you bombard clear acrylic piece with electrons from a linear particle accelerator? You create beautiful, one-of a kind sculptures we call "captured lightning." Each branching, tree-like or fern-like pattern encased in crystal clear acrylic is unique. Instructions describe how they are made and how they are cared for. They are also available in 4 x 4 3/4"(615-3260) and 4 x 6 x 1/2" (615-3262). Sculptures can be lit with optional LED's.