3-D Printing
The technology of 3-D printing has been floating around since the 80s, but only became a tangible device in the 2010s. A lot of 3-D printing is used for prototypes or models of certain products, but it has been used to create prosthetic limbs and even human organs.
Fidget Spinners
How triggering is this picture? Fidget spinners were an insane fad that lasted a little bit too long. They wealsed their way into tons of comedy sketches and editorials on how dumb kids are these days, but at least they pushed a bunch of money into the economy. Fidget spinners can still be found in stores, but it's way less likely to see a mob of kids whipping these things around on the street nowadays.