This is the website for the photographer that hosted the workshop:
http://michaelbartonart.com/
He's based out of Batavia, IL (near Chicago). This particular workshop was called "Terrible Twos". He brought in 4 two year olds throughout the day (one at a time) and basically we would watch him at work and then we would have an opportunity to photograph as well and he would give tips, etc. It was great for me to help build some confidence to do these sorts of shoots on my own and also to see a pro at work.
http://www.flickr.com/photos/sambisu/
5DIII, T2i, Canon 24-70 f/2.8L II, Canon 70-200 f/2.8L IS II, Canon 18-55mm f/3.5-5.6 IS II, Canon 55-250mm f/4-5.6 IS II, 600EX-RT x2