This course takes "Design of floating objects" as the theme of the special study. During the implementation process, the design thinking teaching strategy of ARCS learning motivation theory is adopted. By addressing the problem of floating objects and garbage in the sea, it arouses children's concern for marine conservation and guides children how to Use the materials collected from sea drifts as creative media, use associations, and correspond to the experiences and feelings in life as the source of composition to design and compose. Finally, children develop confidence and a sense of accomplishment in their creative works, providing children with an interesting and successful learning experience.