You may hold objects for them or anchor them down.
People do not seem to pay any attention to which hand you use to demonstrate. If you are left handed, go ahead and demonstrate with your left hand. If they are left handed, ignore it.
Colouring is the easiest activity to modify by giving them a large crayon. Larger tiles can be made and follow the same designs for copying. The moving test can use a larger dowel stick.
You can adjust lighting and ask the person which lighting situation works the best for them.
All of the standardisation has strengthened the visual cues to eliminate as many problems with acuity as possible.
The colours selected for the activities tried to eliminate this factor. If you run into a problem, the following are ways to adapt.
People who are colour blind rarely talk about it and chances are you will not know about it ahead of time. Some people cannot distinguish between red and green while others cannot distinguish between blue and yellow.
If these colours are not matched to the sample, check for colour identification by asking them to point to all eight colours as you name them. You could also ask them to match colours by using a second set. Hand them one colour at a time and ask them to find one that is the same.
Select a location with minimal auditory background noise. Ask about hearing problems if they fail to follow your verbal directions.
During the sensing activity, follow the directions for using visual cues when hearing difficulties are suspected.