Where did we store this healing clay again? Just grab some healing clay or modelling clay, dilute with water and stir with a bit of heating until it drips nicely.
One of your roommates may have a cardboard box, large enough for two heads. Two cuts for the necks, some plastic foil, ready to go.
Pour the clay gently, making sure it is covering nose and mouth, for some exciting breathplay.
That's it. Have a great time!