All aboard! The Green Toys Stack & Sort Train is a one-stop shop for practicing motor skills, color matching, counting, sorting, stacking, and just plain fun! The 12-piece Train set includes a train engine, shape sorting car with removable roof, cargo car, 4 shapes (circle, square, triangle, and star) featuring a puppy, kitten, mouse, and bunny, and 4 numbered, graduated stacking pieces that nest easily in the cargo car, with designs that match their corresponding-color shape.