Cubic Fun 3D Puzzles ST Basil’s Cathedral Moscow, CubicFun 3D Puzzles are an educational and eco-friendly toy that will help improve puzzle lovers concentration and creativity. Our 3D Puzzles are not only limited to puzzle lovers but also they are great for children and families of all ages. Easy to follow step-by-step instructions are included, and the pre-cut paper and foam board puzzle pieces are precision made to fit perfectly together and glue and tools are not required!