For all of the combos simply layer in order of the ingredients!
Note: for the seafood salad, mix the mayo, milk, salt, pepper and cheese together before putting in as a layer
Note: dressing on the bottom, lettuce on the top. If the two are touching the lettuce will turn to slime.
Put your 'hearty' vegetables (ssuch a carrots sticks, shredded cabbage or peapods) on top of the dressing as they can withstand the acidity better.
Note: don't pack it in too tight! Use a nice variety of colourful vegetables!
Make it fun and involve the kids (plastic containers for the kids instead of a glass jar).