Tread lightly. I attended the Cynopsis Kids Business Summit a few weeks ago, and one of the panels featured 5 kid/tweens who were all hooked on Snapchat. I asked how they would feel about brands marketing to them there, much like what happens on Facebook and Twitter, and they unanimously said "leave our Snapchat alone." Snapchat, at least for kids and tweens, is a communication tool between friends. They don't consider it an open forum like other social networks, and they said they would be disappointed in brands who tried to reach them there.
I know that doesn't answer your question per se, but be aware that there could be a backlash depending on your audience.