In this activity on page 8 of the PDF, learners make three of Harry Potter's essential school supplies: quills, ink, and color-changing paper. Learners use supplies from the grocery store to make ancient iron tannate ink (permanent), color-changing paper, and a feather quill pen. Safety notes: Wear eye protection and be careful with hot liquids. The ink is permanent and will stain clothes. Follow Milli's safety tips on page 3 of the PDF.