Grapho-Sphere translates to 'Writing-Ball' and is an assistive writing tool for persons who cannot fully move digits in hand, do have some gross motor skills but lack ability to develop fine motor skills and have cognitive ability and desire to sign own name when required to do so.
Foam of desired density (I’m using a foam football that was perfect)
Large bread knife
Small paring or steak knife
Small stick/toothpick (I used a small Alen Key)
Individual A (person for who i made the tool):
Can’t grasp a pencil/pen
Can loosely grasp a large marker
Can (due to resistance in hand function and foam density) hold a soft rubber/foam ball
Depending on a persons degree of ability the ball can be made with different foam densities. I chose a medium soft foam for the individual after having them test it out.
Also pictured are my original sketches.
Step 1: Measure & Divide
First I measured the palm of the persons hand that I was designing the tool for. It was 3 inches.
I then marked the 3 inches onto the index card and made a 3x3 square.
I cut the football in half between the middle to laces, I sawed with the bread knife.