1. Combine first 4 ingredients in a large bowl, stirring with a spoon. Stir in tuna, onion, and raisins, breaking up any large chunks of tuna with a spoon.
2. Spoon about 1/3 cup tuna mixture down center of each tortilla. Top each with 1/2 cup lettuce; roll up. Wrap in plastic wrap or foil, and chill until serving.
Young Chefs can:
Tear lettuce leaves
Pour tuna in colander or strainer to drain
Older Chefs can:
Stir together measured ingredients
Help spoon tuna on tortillas and assemble wraps