Ah...these hearts.....air dry clay and a sharpie. Or several different coloured sharpies!
Color Mixing with Sharpies
The Best of Alcohol Ink Art | Exploring Alcohol Ink in Art
Miro on Coffee Filters
Lindo y fácil -translation pretty and easy - no instructions but photos show how.
A little retro, a lotta cool. could use scrapbook paper and old book pages for fun textures!
Gel II Sharpie Marble / Granite nails - TUTORIAL Darling Digits - YouTube
Easy trick for transferring typography/hand lettering onto wood