 Anti-smoking advocates see this as a gateway product for kids. It's called Senza, a nicotine-free e-cigarette. Tobacco maker R.J. Reynolds says it'll market the product to adults 21 and older, but the campaign for tobacco-free kids isn't buying it. It says with fun-sounding fruit flavors like watermelon frost and berry fusion and brightly colored packaging, the product is targeted at kids and teens. The Wall Street Journal says regulating Senza would be something of a gray area since it doesn't contain nicotine.