+1 Lara Bars. Not sure what kind of pricing you get, but they would be a good alternative to candy bars.
What about pretzels or a version popcorn? Not super healthy, but can limit damage done by chocolate bars and doritos. If they are looking to get a snack–they may be open to one of these intermediate options.
A Lara Bar has ~200 calories, with 100 of them from fat, plus 16-20 grams of sugar, 4 grams of protein, and 3 grams of fiber.
A Snickers Bar has ~280 calories, with 130 of them from fat, plus 30 grams of sugar, 4 grams of protein, and 1 gram of fiber.
The Lara Bar looks an awful lot like a candy bar, regardless of how they market and price it.