Just a litte fun puzzle. I used a 4x25mm. bolt with the head cut off in the holes.

Tried with 3d printed pins but they broke to easy.

Install the splits / Bolts in the holes as shown.

Push them all the way in the holes.

Put the sticks on top of each other.

Slowly slide the square over the sticks.

When its in the middel, slowly move the sticks so they make an “X”

If done right the parts wil fit. Shake it and its locked :)

Get the square out, only possible if you spin the puzzle. Watch how in the video :)

https://uploadlite.com/d/7EPxBwFf905QYi