Make sure to print this with 100% wood Filament! Plastic Filament will lead to a humid environment and the resulting mold can kill the larvae. Printing with 100% wood Filament also prevents environmental damage through (Micro-)plastics.

Just stack on top of each other and make sure, the plates are kept somewhat sturdy together and place wherever you need some wildbees for pollination.

I personally used the Extrudr Wood Filament but other brands with similar composition should also work. Set it to 0.2mm Resolution and use a 0.6mm Nozzle to avoid clogging (it should work with 0.4mm too but clogging might occur more often).

Best thing is: If you use the Extrudr Wood Filament it's completely compostable.

This thing absolutely works! Put it onto sunny sides, with easy access to all the friendly animals and within a few days, the first insects should show interest.