Irrational Number Line Games, LLC
Everyone has made a "cross box", right? I didnt draw on the tabs, and I usually don't. I just freehand cut three tabs on the bottom piece. My technique is just to leave a big triangle, point away from the side of the box face, then truncate it.
Since I had some orphan legs lying around from some project, I decided to make the classic "Dude hiding in a box" joke. I'm not sure Mr. Clean (you can't see in this pic, but he does have the earring) will find him, but it's nice to have a custom "something's hiding here" marker instead of just using a poker chip.