Looking to startle your guests with fast and furious seance action? Glue a small remote-control toy car to the bottom of an Ouija board planchet. We used a Circuit Board skateboard by Hexbug to bring this one to life.
Have an old Mac laying around, collecting dust? This clever DIY Instructables project shows you how to turn it into a fun Mac O'Lantern for Halloween. All you need is the computer, spray paint, scissors and some epoxy.
Add one of the coolest parts of Disney's "The Haunted Mansion" ride to your own Halloween display! This Instructables DIY shows you how to create talking, disembodied heads using an Arduino controller, a VGA projector, some styrofoam busts, and other basic hardware you likely have around the house.
No mad scientist's lab is complete without its own talking, glowing brain. Creating the creepy cerebrum shown requires some wiring and programming know-how, but this Instructables DIY walks you through the project step-by-step.
Dry ice -- frozen carbon dioxide -- is the age-old secret behind bubbling witches' brews, magic potions, mystical cauldrons and other props that call for a thin blanket of harmless mist. Drop a chunk into water and you'll set off a violent (but safe!) bubbling reaction as carbon dioxide gas is released.
Warning: Dry ice is extremely cold and should not be touched with bare hands. It is definitely not food, either, so don't put it in your mouth. The mist itself is carbon dioxide, and is safe to touch and breathe.
This kid-friendly DIY Halloween project combines a 3V motor and a small microcontroller to simulate a ghastly haunting. Tap the box once, and the spirit inside will tap once back. Tap 13 times, and the box will play the "Addams Family" theme song.
Have a color printer at home? Take a couple of pictures of a friend's face, edit them into a printable sheet, roll the printout up, and then stuff it into a mason jar. This Best Buy DIY page shows you how.
Want advanced warning when a guest is about to enter your haunted house? Or maybe you just want to catch those darn teens who keep jacking your o'-lanterns? Sticking a wireless camera in a hollowed out pumpkin will do just the trick.
With some commonly available materials (mainly plastic tubing and string) and this Instructables DIY, you can create your own animatronic hand. Cover the end product with a layer of latex to simulate skin (or lack thereof) and you're ready to terrorize your friends.
The secret to creating graveyard-style fog that hugs the ground, rather than spewing upward, is to chill the fog as it exits your fog machine. You can MacGyver a cheap fog cooler using a styrofoam ice chest and some piping from your local hardware store that's at least 4 inches (10 centimeters) in diameter and 4 feet (1.2 meters) long.
Cut holes in both ends of the ice chest, near the bottom, then run the pipe though both holes. Fill the chest with ice, so the ice covers the pipe, close the lid, point your fog machine nozzle into one end of the pipe, and blast away.
Jacob's Ladder, the mad scientist prop that shows off live electricity, can easily be built with this RM Cybernetics tutorial. Be sure to complete the aesthetic with bell jars, beakers and other smart props.