He invented a visible red-light diode. His 41 patents also included lasers that enabled DVD and CD players. By Sam Roberts Nick Holonyak Jr., an electrical engineer who became known as the ...

This Is Local London have teamed up with Nick Jr. to give readers the chance to go to this summer's must-attend family event and top DVD titles.

Walmart, Target, and Amazon debut first two DVD releases of Genius Brands International’s original animated preschool series, Rainbow Rangers, which airs in the U.S. on Nickelodeon’s Nick Jr.