Based on the dot-based expressions of Japanese artist Yayoi Kusama, through art appreciation activity in class, children enter the Yayoi Kusama's world of Polka dots and discover the variations in colors and magics of the subtle combinations of colors. This fourth-grade artist exhibits rich imagination, showcasing the ability to fantasize and vividly tell stories in his artwork. The kingdom the artist has constructed is a joyful paradise full of laughter. There are clever touches and ideas seen in his picture such as the characters are portrayed in various expressions and movements, all depicting scenes of happiness that resonate with the theme of the amusement park. The artwork reflects free-thinking and personalized expressions which are complemented by vibrant yet harmonious color tones. The handling of infinite imaginative colors and space is just right with a good balance.