Here are some of the things I've made!
At my house there is a big, cheap clock. (It was a free gift for going to look at properties in the Poconos.)
I measured it on every side, and reduced it to 1:12 scale, and based this clock on that.
I made a few changes in it that seemed like would make it look nicer.
This is the second clock I made.
I also made a bunch of "books" to put in it! I have a collection of 19th-century books, and I used them to make these book covers.
There is a web page just on the book covers, with the covers that can be used to make your own miniature books.
Here is the clock in a dollhouse:
I made a toy chest also based on something at my house. For this, since the shape was a bit more complex, I photographed it on all sides in addition to measuring it. I then printed it out 1/12 the original size, and used the pictures as templates to cut out the shapes. I used a dowel for the posts. I cut up some old clothes to make the cushion.
Here is the second toy chest I made, with fancier decorations
For Halloween, I made this coffin. I found the dimensions on the internet. I made the arm sticking out of the coffin by carving it out of a small piece of wood, and I cut up an old shirt to make its sleeve. I made the chain by twisting wire to make the links one by one.
This is a birdhouse I made. I found instructions for making a birdhouse on the internet, and simply reduced all the measurements by 1/12 to make this.
This is a little Rocking Chair that I made. I copied it from a rocking chair in a comic strip!