â—† Learning different shapes and stacking is loads of fun! This colourful and engaging Geometric Block Sorter by Vigais packed full of educational benefits for your child. The Geometric Shape Sorter consists of a wooden stand with vertical rods to match shapes including 5 rods to place pentagon, 4 rods to place square, 3 rodes to place triangle, 2 rods to place rectangle and 1 rod to place circle. The number of holes in each shape relates to how many sides the shape has.