My 3 1/2 year old Mustang mare is incredibly smart and loves to figure out new tasks. We have worked on a lot of basic groundwork such as lunging with a line and free lunging, desensitizing, making sure she stands for fly spray, mounting, when tied, etc. I have also taken her for walks all over parts of the farm and different rooms in the barn to introduce her to new things.
She figures out what I want from her incredibly fast, and though I do touch base with her to make sure she still remembers (and still start every session with a few minutes of free lunging even if we aren't going to be riding) I can see her getting bored with something once she has figured it out. I'd like to keep work fun and interesting with her, but continue to work with her on the ground introducing her to new concepts and things. Any ideas of what we could do? We have access to an indoor arena, and outdoor unfenced, and a roundpen, as well as poles and cones.