A short clip of Tom Kelley's speech at Stanford about the value of experimenting:
WD-40 - the trademark name of a penetrating oil and water-displacing spray ubiquitous in the states and Brazil. WD = "Water Displacement", 40 = the number of tries it took to get the formula right.
James Dyson - the founder of Dyson Ltd., known worldwide for its unique range of vacuum cleaners, hand dryers, bladeless fans, and heaters. His company developed 5,127 prototype designs between 1979 and 1984 - before they had anything market-worthy.