In Roald Dahl's book "My Uncle Oswald," the theme of playfulness and enjoyment is emphasized through the notion that life is enhanced by engaging in games. This reflects a broader idea that incorporating fun and spontaneity into daily life can lead to greater satisfaction and happiness. The characters often experience adventures that highlight the joy of taking risks and embracing playful endeavors.

The quote, "Life is more fun if you play games," encapsulates the essence of Dahl's storytelling, where the imagination and whimsical elements contribute to the narrative. It suggests that by adopting a playful attitude, one can find joy in ordinary moments, making life more vibrant and memorable.