The boxes are made of unbleached cardboard and cornstarch, 100% compostable, 10 x 7,5 cm. Wooden pencils for identifying plants and coloring stickers for decorating boxes are included. Contents: 20 compostable boxes (250ml), 20 bags of soil (907g in total), 20 pencils, assorted seeds: purple bean, nasturtium, sunflower sprouts and catnip (wheat), coloring stickers and instructions. Note that seeds may vary depending on availability.