Pet Rock creator Gary Ross Dahl became a millionaire from his rock sales in the 1970s. Each rock came in a special box (bottom left) with a detailed instruction manual.
San Francisco Chronicle/AP
For the past 34 years, the William Grant Still Arts Center has held a Black Doll Show to showcase diverse dolls for children. The exhibit features dolls submitted by artists and collectors from around the country.
A product image shows the new Research Institute playset from Lego, which features women in roles as three scientists. In January, the company was criticized by a girl who said all its female characters were "boring."
At left is a reproduction of the original G.I. Joe action figure made in 1964. The doll on the right is a newer G.I. Joe model. Hasbro executive Donald Levine, who oversaw the action figure's creation, died last week of cancer.