Whiteboard
Whiteboards became commercially available in the early 1960s, but did not become widely used until 30 years later. Early whiteboards needed to be wiped with a damp cloth and markers had a tendency to leave marks behind, even after erasing the board. Dry-erase markers for whiteboards were invented in 1975.
Fingerboard (skateboard)
A fingerboard is a working replica (about 1:8 scaled) of a skateboard that a person "rides" by replicating skateboarding maneuvers with their fingers, invented by Cameron Fox Bryant. The device itself is a scaled-down skateboard complete with graphics, trucks and moving wheels. A fingerboard is commonly about 100 millimeters long, and can have a variety of widths ranging from 26 to 34 mm. Skateboarding tricks may be performed using fingers instead of feet. Tricks done on a fingerboard are inspired by tricks done on real skateboards. Pofessional skateboarder Lance Mountain is widely credited as making the first fingerboard, and his skit in Powell-Peralta's "Future Primitive" video brought fingerboarding to the skateboarders of the world in the mid-1980s. Around the same time, he wrote an article on how to make fingerboards in TransWorld SKATEboarding magazine.