An Acorn favorite, this vintage-inspired card has been adapted from "Real Things in Nature: A Reading Book of Science for American Boys and Girls," (1908), by Edward S. Holden, courtesy of Harvard University. The card includes a kraft paper envelope and is blank on the inside, providing ample space for a message.

• 300 gsm Italian paper, 120 gsm recycled kraft, and vegetable-based inks
• 6.69" x 4.72"
• Made in the UK