Pick your acorns in the fall, preferably in October. Place them in a bowl of water and let them soak for 3 to 6 weeks, until they have started to sprout.
Fill the Acorn vase with water and put your sprouting acorn in it. After a further 3 to 6 weeks, a delicate little oak seedling will sprout.
Enjoy your beautiful oak seedling. Avoid direct sunlight since sun through glass may cause burn damage to adjacent surfaces.