Tom and Mot are best friends who share the same birthday. Tom gives Mot a feather—and imagines it to be from the most spectacular bird. Mot gives Tom a marble—perhaps the smallest planet in the universe. Their simple gifts ignite grand adventures: they ride dinosaurs, sail the seas, drift through space, all while playing joyfully in the rain. At the end of their magical day, they discover that the greatest gift of all is simply spending time together.