How about running them through the whole shebang of setting up an adwords account with your company? From the initial phone call with a client, researching exactly what they need, pricing things up, making up invoices, actually placing the ads on Google, follow up calls to clients to ask if they are happy or not, tracking results, etc. As Gordon says, I wouldn't let them anywhere near a client but if they have a good grasp of the whole process and the work that needs to be done you could let them loose on making up paperwork and maybe research some campaigns. Oh, and a bit of photocopying didn't hurt anyone.:thumbup1: