Consider using different sizes and shapes of spheres for a variety of gazing balls. You can also experiment with different color themes by selecting foil wrappers in specific color palettes, such as blues and greens for a cooler look or reds and yellows for a warmer feel. For added durability, especially if placed outdoors, consider applying a clear sealant over the finished mosaic to protect it from the elements. Additionally, you can attach a stand or stake to the bottom of the ball for easier placement in the garden.