Here is some work for him. Bind them together. Unfortunately you won't see the bees in the straws only goes in there, but they will nest in there.
Bees love it.
But again nothing to see. Lay it horizontal and with a pen or something else, make holes in it. Then you can mount it verticaly on the wall. Protect it from the rain with a roof or with one sideboard being wider. Face it down a little bit, leaning forward, prone, to keep the rain out.