Pre-form exercises
Ingredients: four bricks. Lay them out in a square pattern, distance approximately each stone 40cm (12 inches) from the centre.
I
I I
I
With eyes closed walk at random across the bricks with empty step. At least 10 minutes per day. When it is getting too easy, move the bricks further apart.. Empty steps always, full attention in your feet.
Maybe you can set the bricks on their (more narrow) sides after a month or so, again with distance at 40cm. After a year you may try to place them upright