Decorations like these are simple to create and make a spooky addition to any haunted house or Halloween bash.
The Martha Stewart Show, October 2007
Turn bottle over. Squeeze bottle gently several times; plaster will begin filling balloon. (Not all of the plaster will make it into the balloon.)
Let the balloon dry overnight.
Insert balloon pump and inflate balloon; it should reach a 6- to 8-inch diameter.
Remove balloon opening from bottle mouth.
Remove balloon and tie firmly.
Roll it around for about a minute, trying to evenly distribute the liquid within.
Begin rotating balloon gently in your hands.
Place balloon in tub of water to set so it won't dent while the plaster is drying.
Use the utility knife to create cracks around the hole.
Remove the balloon by lightly dragging a utility knife across the surface.
Glue glittered spider near hole.
An "egg" will often have a hole that can be made by tapping the egg with hard instrument. Try to find a thin shell area and continue tapping and chipping away at the fragile surface until you have an opening you like.
Pre-inflate balloon and let air out so it stretches.
Mix 12 ounces of plaster and 6 ounces of water in the bottle. Shake vigorously for 20 to 30 seconds.
Stretch balloon opening over mouth of bottle.
Set egg in small urn or other egg cup; style it with Spanish moss to create a nest.
Drop a glow stick through the initial hole.
8 ounces of plaster of paris
4 ounces of water
12-ounce or larger plastic bottle (empty with cap)