These clear acrylic spheres are really easy to use. First, when you're making human-sized eyes, you can use them to shape both the inside and outside parts. Just place them where you need the eye shape and start your work. For sculpting open eye sculptures, they'll give you a great base to build on. When handling these spheres, be careful not to drop them as they can break. To keep them in good condition, clean them with a soft, dry cloth regularly. Avoid using harsh chemicals as they might damage the clear surface. That's all you need to know to get the most out of these acrylic spheres!