The Halloween decoration I love most (as well as any visitors) is our Halloween "Growth Chart"
For several years we have been painting feet ghosts, and spider hands and recording my kids ages on them.
Nothing more fun than to see how quickly they grow!
To make the spiders, simply place both of the child's hands in black paint (trying not to get the thumb) and then place it onto the paper! One on top of the other in opposite directions! Add googly eyes, or use paint to make your own eyes!
For the ghost's, simply place child's foot in white paint, then onto the paper. After it's dry, use googly eyes, or a marker to draw eyes for the final touch!
Do it for one year, and treasure the keepsake. Of do it for several years! So easy, yet so fun.