Every holiday season, parents around the world face the same daunting question: What plaything will make my child light up? As the 20th century progressed and kids became increasingly exposed to radio and television advertising, chances were good their wish lists included the season’s “hot” toy. From simple classics like stuffed teddy bears and yo-yos to more high-tech diversions like gaming consoles, here's a look back at some of the most popular holiday toys of the last century.