My father uses this tool to improve balance, called the 60uP! balance board.
Here are the benefits of the Balance Board:

The creator, Dan Metcalf, is an amazingly inspiring human being, and started a Facebook Group around the 60uP! Balance Board. During the pandemic he began putting on free Facebook Live training shows that vary in difficulty, and growing to a team of three with Kathy Stevens and Debbie Siebers, two more incredible trainers with different specialites around wellness and movement. These live shows can be found within the Facebook group updates.
Click the image below to jump right to the Facebook Group where Dan Metcalf and his teammates Kathy and offer excellent live training sessions for all levels:

Both my father and I are inspired by Dan and his team. Their passionate efforts and powerful positivity in support of our aging loved ones is an important service to everyone. My father looks forward to the group workouts, a great sense of connection being an important benefit too!
All live sessions have also been posted on a YouTube playlist called Uploads from 60uP Balance System.