Amazon has the 220-Piece Tytan SUPERSIZED Magnetic Tiles Building Set (TYT-MAGTILE-220) for $40 with free shipping. Includes 45 squares, 20 hollow squares, 30 right triangles, 15 tall triangles, 20 rectangles, 50 equilateral triangles, 15 two pane windows, 10 four pane windows, 15 castle battlements.