I designed this "Lego Catcher" to stop all my lego pieces from going into the floor register.

I previously bought some Floor Register Trap from Amazon but they don't fit my vent opening due to the irregular shape of the vent opening, hence I created this customized size screen in OpenSCAD. It is slightly bigger than what I can print with my AnkerMake M5 so I had to split it to two in Creality Print and glue them together after printing both parts.