Our second exercise was much the same as the first, except we now had boxes on top of boxes. The idea being to get the dogs to search at different heights.
Our third exercise is what I think of as the most fun. We turn over chairs and get the food out of the box. The first time you can see in the video where Steeler catches the scent of the food. Then the second time he immediately went back to the same spot to make sure there wasn't anything there.