Here is my nest after I added the fiber and tacked down the stray ends. My husband drilled some holes in the plastic eggs so that I could sew them on rather than gluing them. Much more secure.
I Googled to see what type of bird lays beige speckled eggs and I found that sparrows do and we get them in abundance in our backyard. They seem to nest mostly in the hedge we have along one side of our garden. It's quite a substantial hedge well over 8 feet high and very thick. We once had a cardinal nest in there that was washed out by a heavy rainfall. We rescued it and put it back as both mum and dad cardinal were freaking out very loudly. Luckily they weren't bothered by our intervention. After that peace reigned.
Here's a nice image of a field sparrow's nest.
So a beginning. I'm not sure what I will do next with this block.