In a medium sized mixing bowl add the glue, food coloring and the water. Mix well using a spoon.
Once the water and glue mixture is made and mixed well add in the shaving cream and gently fold it into the glue and water mixture with the spoon.
Add in the baking soda and mix well.
Add saline solution in one teaspoons at a time and mix well. Continue adding saline little by little and mix after each adding and mix until slime start to form.
Add the plastic spiders to the slime and use your hands to mix the spiders into the slime.