It is sometimes helpful for young children to be able to have a visual representation of how many sessions are left (verbal reminds may not be enough), and it can help them better prepare for termination. One way to do this is to create a session-tracking chart.
In the examples above clients color in one image, or choose a sticker, at the end of each session. The activity is quick and also provides a good opportunity for therapists to check-in with clients and help process any feelings surrounding termination that come up throughout the process. These examples can be found here (I created them using "Pages")