Translation of Brutkasten

Of course I have already tried, but it did not work. I will try it again. Meanwhile, here is the reason for my short emails... only one hand free at a time, see explanation in the image of me.
Just last week a friend of mine showed me how to do these special effect, so I was focused about this word. I have been sleeping five hours a night for a week now and I am pretty tired all the time. Hopefully recovery will come soon.
I sell clothes for children, women and men. I love my work. By the way: In Germany it is very cold, minus 15. We seem to be friends for years but have known each other just for two weeks.