Divvy the labor: Adults make pesto and slice baguette, kids spread pesto mixture on bread; place slices on cookie sheet. Garnish with parsley.
Preheat oven to 350°.
Place first 4 ingredients (pesto through black pepper) in a food processor; process until smooth. Spread 2 teaspoons of pesto mixture evenly over each bread slice. Bake on an ungreased baking sheet for 10 minutes. Garnish each slice with 1 parsley leaf.