Building nesting boxes

[Silkiechicken66]

So I’ve got lots of plyboard and boards laying around after revamping a shed. So I’m going to make some nesting boxes! I’d like to see your homemade boxes, and any tips and tricks to making them.
Thanks in advance!

 

[pintail_drake2004]

simple really, I use the KISS method. 12x12x12 per box.

 

[aart]

I lovelovelove my nests.
Inspired by the old metal ones with the round entrances.
Click on pic for more pics and a detailed drawing.