Please create a series of watercolor clipart illustrations featuring different items related to summer. Each illustration should be drawn in a charming and playful style that captures the beauty and vibrancy of the season. Items to include can be beach umbrellas, flip flops, sunglasses, ice cream cones, sandcastles, and seashells. Please use a coherent color palette that is bright, cheerful, and evokes the feeling of warmth and sunshine. Colors that are associated with summer, such as yellows, o