"Develop a design prompt for a unique keychain using silicon plastic and leather materials, with a specific emphasis on resembling a turnip in both color and shape. The keychain should seamlessly combine a greenish hue, akin to a turnip's color, and the distinctive turnip shape. Request detailed attention to crafting the keychain from high-quality silicon plastic and leather, ensuring both visual appeal and durability. Encourage designers to explore creative yet practical approaches in translating the turnip-inspired design into an easily recognizable and functional keychain." --s 750