Melissa and Doug Stacking Train. Load up the train with bright, colorful shapes and get learning off to a rolling start! The 15 easy-to-grasp wooden blocks slot onto rods on the flatcars, providing a great opportunity to practice fine motor skills. For even more play value: The blocks can also be used for stacking, building, and sorting, and the smooth-rolling train cars detach to shorten the train or let children play with the cars individually.