Grandpa also implied, but did not confirm, that he wanted me to strike the cabin with lightning.
While I was in there, the world outside the washroom turned into an audio comedy routine of delight, confusion and alarm. "Oh, it's doing it! Eeee! Oh, no, what did it do? Honey, where did it go? What did you do? Do that thing you did again."
By the time I left the bathroom, my grandparents had managed to accidentally zoom in to 9,000% magnification, they'd inadvertently opened a program I didn't even remember having on my computer, and Grandma had signed her name.
I am proud of her for continuing to try after her confusing and discouraging initial attempts to use the touchpad. Next time I visit, I'll try to remember to bring the mouse - maybe that will be easier for her.
Who knows - if I get her into digital art, she and Grandpa might even disprove my theory that they were going to go to their graves without ever owning a screen-bearing machine more complex than a phone with call display. :P It's never too late!