I had this one in my Pinterest board for a long time and since I had to get the sewing machine out the other day, I thought I'd go ahead and make it. One thing you need to know about me, I have never taken any sewing classes, my husband read the sewing machine manual and taught me how to thread it, I just wing it.
I had this sheet that I purchased at the thrift store laying around, I held it up in the hallway and figured where I had to cut (rip it... to be honest. LOL), then I grabbed some felt, cut the door and cut some strips to make the window, too. I made a flap on top and used one of those spring rods to hold the sheet in place.
My kids keep bringing little kitchen toys and playing behind the door, it's so cute.