Stacking Block Toy Train V2

First Thks to Zanfar and Julien_DaCosta for the initial designs...
...this toy train somehow became the my standard present for the new born of my friends.
I finally took some time and re-designed some of the parts for better fit and added some of my own blocks incl. passengers allowing for dual print (I color the head in a different color).
Changes:
..just added a sphere shape with a naming option in the FreCAD model