The other thing that I have been working on is location concepts - on/off, in/out, under/above, between/next to. You can practice this at home with some of his/her toys (e.g., put the car in the box....put the car above the box....put the block on the car...).
A few of my students are working on problem solving. There are many great ways to do this. I have been using some pictures that I found on Google Images (e.g., people falling on the ice, cars covered in snow, people outside without proper winter clothing) and talking about what is wrong in the picture, what the person could do differently next time to avoid that situation, and so on. There are also some great animated short films on YouTube that you could watch and talk about what they think may happen next, what's the problem, and what they could do to solve the problem (it can be a silly video - see below!).
Bundle up and stay warm!