Create a mood board illustrating the concept of a 'Dog park'. The scene should include various breed of dogs playing, like a Golden Retriever, a Poodle, and a German Shepherd. Also include children of different descents like Hispanic, Middle Eastern and Caucasian happily interacting with the dogs. Add iconic features of a dog park such as agility equipment, park benches, trees, and an open green space. The weather should be bright and sunny, indicating a perfect day at the park. The colors should be vibrant, showcasing the fun, outdoorsy, and lively atmosphere of a dog park.