At the end of the lesson we do a 'getting to know you' activity with my infamous 'thumb ball' the kids LOVE it and ask to use it often. Some students have even asked where I got it so they can get one! It's a great tool to use to get to know students, as an icebreaker, and even as an incentive for following classroom procedures and finishing the lesson with extra time remaining!
When meeting with the young students we are a bit more creative with our approach and how we share what we do. To do this and keep the students engaged, we compare ourselves to Mrs. Potato Head! We ask the students how we are like Mrs. Potato Head and they certainly give creative responses. :) Then we go into detail about how our job and what we do is comparable to Mrs. Potato Head, for example we have ears to listen to students, hands to 'lend a helping hand' when students are in need of help or to give 'high fives' to celebrate successes with them, the glasses are to help students see more clearly and gain a different perspective to the problem they have, the purse/bag is full of tools and ideas to help students work through their problems, etc. The students really get into it and it also allows students to take turn and celebrate differences (i.e. what one student might select for the hat might be different from another student). I've also heard of counselors using a beach bag of tools that relate to their job, you can even use a beach ball and add questions to the different sections much like the thumb ball.
Another way we advertise our comprehensive program and all the components of our job, while also letting people know where we are is through our "Where is the Counselor" door sign. I made the apple sign my first year as a counselor and used library pockets to demonstrate where I was in the building. Since it's one of the first things I made as a counselor, it means a lot to me and it has traveled with me to every school I've been at. When I was split between two schools I wanted one for my other office so I made a fish and used Velcro to show where I was in that building. It's now in the safe possession of my co-counselor.