I know I would. I've been using plain d6s and a printout to teach the
game, as I never bought a single Treehouse stash.
I used a fine point sharpie marker and a plain d6 when I was first learning Treehouse, since I got my pyramids the old fashioned way. Now that I've ordered official TH dice, I think I might still use my homemade ones because they're just plain nifty :)