For sink, I used a plastic container of the kind you get jam in for breakfast in hotels. I painted it metallic. I used a lid from a spice jar to make a washing machine door. I know that you'd probably have a dishwasher rather than a washing machine in this place, but the lid was too good not to use.
Meanwhile, I also painted the stairs white and made a railing, which is very difficult to make, as anyone knows who has attempted.
I glued bits of venetian blind onto cardboard and scratched them with a craft knife to imitate gaps between drawers. For handles I used tiny things on wires the purpose of which I don't know. I got them from my dollhouse-making cousin. I drilled holes and pulled the wires through, fixing them at the back. I glued a bit of glossy paper on the top to make a hob, and painted rings with a gold pen. I made the chimney hood from a hotel soap-dish lid and glued small bits of Lego for lights.
I made the kitchen table from yet another piece of venetian blind and used unidentifiable plastic clips for legs. The fancy mugs are cut from a pencil, with half a bead for handle. As I have already mentioned, the fridge is a tin tea box.