I have to admit that I'm a bit of a hoarder at times... and I tend to save a lot of the offcuts from my crafting projects in a couple of small boxes (one for the paper printouts, and one for scrap card/foamcore).
And every now and again I like to dig through them and have a go at making something... I don't really have a plan... anything will do.
So here's tonight's experiment - a narrow dungeon entrance/exit: