The Shape Sequence Sorting Set is a multifunctional preschool toy that promotes color recognition, sorting, sequencing and shapes and more. Blocks can be separated and sorted by color, shape, or nest them inside each other to discover differences in size and spacial relationships. Take all the blocks off the base and have matching game, matching color to color or shape to shape. The Shape Sequence Sorter by Melissa and Doug is an excellent way to introduce math concepts to your preschooler. For ages 3 years and up.