The Slinky Spring is a classic toy & seemingly simple, but listen to this… The Power Spring, invented by the naval engineer Richard James in the 1940s has been used in NASA physics experiments! The Power Spring is a helical spring that stretches & compresses with the aid of gravity & its own momentum. If youve seen Ace Ventura, youll know it travels particularly well down stairs, moving end over end like a little metal worm! The Power Spring has even been used as a radio aerial in times of war & as a teaching aid in the classroom. What will you do with yours? Whether it’s simply your favourite toy, a gift someone, or for use as an educational tool, everybody loves a Slinky!