Azul el sombrero, verde el sombrero (Blue Hat, Green Hat -- Spanish version)
Sandra Boynton is a popular American humorist, songwriter, children’s author, and illustrator. Boynton has written and illustrated more than forty books for both children and adults, as well as more than four thousand greeting cards and four music albums. She has designed—for various companies—calendars, wallpaper, bedding, stationery, paper goods, clothing, jewelry, and plush toys.