  Most digital bodily games focus on the body as they use movement as input.
However, they also draw the player's focus away from the body as the output
occurs on visual displays, creating a divide between the physical body and the
virtual world. We propose a novel approach - the "Body as a Play Material" -
where a player uses their body as both input and output to unify the physical
body and the virtual world. To showcase this approach, we designed three games
where a player uses one of their hands (input) to play against the other hand
(output) by loaning control over its movements to an Electrical Muscle
Stimulation (EMS) system. We conducted a thematic analysis on the data obtained
from a field study with 12 participants to articulate four player experience
themes. We discuss our results about how participants appreciated the
engagement with the variety of bodily movements for play and the ambiguity of
using their body as a play material. Ultimately, our work aims to unify the
physical body and the virtual world.
