Wash hands with soap and water.
Preheat oven to 250 °F.
In a large bowl, combine pecans, popcorn, fish crackers, cereal, pretzels and oyster crackers. Set aside.
Combine salad dressing mix and oil in glass measuring cup. Pour dressing over dry ingredients and toss well. Spread mixture on ungreased baking sheet and bake 30minutes.
Let mixture cool on pan. When cool, stir in raisins. Store in 3-quart airtight container.
Allow kids to pour snack mix into plastic bags, tie with pretty plaid ribbon, and attach the recipe for take-home party favors or holiday gift-giving.