An engaging kids coloring page showcasing a group of dinosaurs in a lush prehistoric landscape. The dinosaurs should be drawn with thick black outlines and no shading, allowing for easy coloring. The landscape should feature mountains, a flowing river, and vibrant vegetation, including tall palm trees. The 9: 11 aspect ratio will provide ample space for young artists to unleash their creativity and bring the scene to life. Illustration, vivid and inviting digital art,