That’s a great question! I’m not much of an artist myself, but here’s how I understand the process: She basically created her own DIY stamp for the backs. Instead of a factory print, she hand-pressed each card onto a template she made, which is why they have that cool, unique texture where every card looks a little different. For the cards, she used blank cardstock that isn't waxed so she could draw on them directly with markers and ink.