The ARC pen pictured above might look laughably large, but it could be the perfect option for folks with Parkinson's disease. It was created by a group of students from UK's Royal College of Art and the Imperial College London to combat a Parkinson's symptom called micrographia. That's characterized by a patient's handwriting becoming smaller and more cramped as they go along, to the point that it's not readable anymore. This pen prevents that from happening by stimulating key muscles through vibration (it's equipped with motors to make that happen), giving users more control over their hands. Further, its large size makes it more comfortable to hold than regular pens.