This is a great way to introduce kids to scallops -- they're mild, and even more appealing when accompanied by corn on the cob.
Heat oven to 400 degrees. Combine oil, thyme, garlic powder, and salt in large bowl; add zucchini, carrots, and scallops and toss. Place 1/4 veggie-scallop mixture in middle of each of 4 foil sheets; add 2 pieces corn per sheet, one on either side of mixture. Seal packets and place on foil-covered baking pan. Bake for 20 minutes. Serve with lemon wedges, if desired.