Placing fake spiders everywhere will definitely add some Halloween feel to your kitchen. You could hide some in your fridge or pantry, others could be crawling out of your sink, all over your countertops and, of course, your kitchen table. If you like to go that route consider putting up some spiderwebs as well.
Use dry ice for some mysterious fog flowing freely from your kitchens sink or out of a cooler is another good way to give your friends and family the heebie-jeebies. Dry ice can create a fog-like effect for that extra spooky Halloween touch. However, before using dry ice make sure to read up on dry ice safety: http://www.uvm.edu/safety/lab/DryIce
If you are tired of the “ordinary” Jack-O-Lanterns, why not turn your pumpkins into a litter of black pumpkin cats? Just spray the pumpkin black, carve out a cat face and glue some felt triangles to the top for cat ears. Put a candle inside and a grinning cat will greet your visitors. Another way to give your pumpkins that extra edge: use glitter and glam your Jack-O-Lantern up a little. Just use glue and black glitter and let your kids come up with different designs. This makes for a fun project for the entire family.