CREATE TABLE table_368 ("Date of Issue" TEXT, "Theme" TEXT, "Denomination" TEXT, "Design" TEXT, "Illustration" TEXT, "Printing Process" TEXT, "Paper Type" TEXT, "First Day Cover Cancellation" TEXT)

Who is the designer of the Christmas: Winter Fun (USA) stamp?
SELECT "Design" FROM table_368 WHERE "Theme" = 'Christmas: Winter Fun (USA)'
SELECT "Design" FROM "table_368" WHERE "Theme" = 'Christmas: Winter Fun (USA)'