Heat oven to 250 degrees. Mix in large baking pan:

1 c. Kix cereal
1 c. Cheerios
1 c. pretzel sticks
1/2 c. mixed nuts

Melt 3 tablespoons butter in saucepan. Stir in 1/4 teaspoon Worcestershire sauce, 1/8 teaspoon garlic salt, 1/8 teaspoon celery salt. Pour over cereals and stir. Bake 30 minutes, stir with wooden spoon several times.