Mexican Train Box

I designed this little box to
* have the same footprint as a standard domino (1"x2")
* hold 8 little train markers

It's a snug fit, I have to alternate the trains upside-down for them all to fit in.
I added a little lip on the inside of the lid and on the outside of the box. This helps it to snap into place. If it doesn't come off easily, a slight press on the side of the box should help to release it. I added .2mm on all sides for a fairly snug fit, but found that a little sanding on the top corners of the box or a little scraping with a deburring tool helped it go together more easily.

The trains I used are from B-Cup : https://www.thingiverse.com/thing:4251441
And the hub is from sthone : https://www.thingiverse.com/thing:2740558
I've included them both here for completeness.