Issued by the Netherlands in 1973, this bright and minimalist 25 + 10 cent semi-postal stamp features an illustration of three children singing together. The design, by Dick Bruna, creator of the beloved “Miffy” character, embodies warmth and simplicity with bold red and yellow tones. The surtax of 10 cents supported child welfare programs, continuing the country’s tradition of Christmas and youth-themed charity issues. A classic example of Bruna’s iconic graphic style, it remains a favorite among collectors of modern design and semi-postal stamps.