Very similar to our unique job-aid: Social Engineering Red Flags with 22 things to watch out for in email, we created an (PDF) about Mobile threats that you can send to all of them, or even print it, laminate it, and pin it on their wall.
"Don't let your guard down just because you're on a mobile device. Be just as careful as you would on a desktop!"
20 Ways to Block Mobile Attacks
You can download the PDF here: how_to_block_mobile_attacks.pdf
