Train of Blocks and Magnets

thingiverse

This model train can be viewed as the 3D printed equivalent of a model train built from wooden blocks for kids to play with. You can add blocks to cars, link the cars, and so on. This is similar but now using 3D printed building blocks instead. The construction method differs, with magnets used to snap the blocks onto trains and locomotives. If you indeed use this for children's play, I would recommend gluing the magnets into place. Although the design allows for it without glue, it's better to be safe than sorry about those tiny magnets coming loose. You can add as many cars as you like or create your own and add them. It uses 5x5x5 mm magnets. It is printed with a 0.2mm layer height.