2. Barbie

Inspired by a risqué doll from Germany, the co-founder of Mattel toys forever revolutionized the doll industry for young girls.

3. He-Man

Creators responsible for reviving a toy company's struggling action figure line discuss the epic rise and fall of their billion-dollar empire.

4. G.I. Joe

Credited with coining the term "action figure" more than 50 years ago, a group of toy marketers reimagined a new genre of dolls for boys.