Can anyone tell me what this is?

I thought for the first blip for my new journal (ive been here before but had to change everything so here is my new blip journal) should be of something that is a bit of a mystery to me.

This lovely structure is on the ceiling of our shed. There is another one, more fully formed, towards the back of the shed, and another thing, but it looks like it didnt get very far in the making.

Anyway, I think this might be some sort of bees hive thing? im not really sure. Im wondering if you lovely people might have some idea of what it is. For those of you who previously followed my old journal, im Molly Rut!