Including the 'needles' made of plant spines other sharp objects. Without this we wouldn't have been able to stitch pelts together to make clothing and clothing allowed us to live in nearly every environment.
My list also includes the knife. Early ones were made from stone, such as flint, by striking the flint with another stone shaping it into a hand held gadget with a cutting edge. It's the direct ancestor of my pocket knife. It provided a simple tool that was used to shape things such as pelts, branches, etc. Must be older than the needle.
Last, but definitely least, I'd say the fire kit which would consist of a stick of hardwood that could be made to rotate fast using the hands or a small bow onto a softer wood. Friction would create hot wood power that was used to start fires. Fire gave access to food which needed to be cooked such as roots and tubers and food which was better cooked such as meat. Our ancestors also used fire to manipulate their environment to their benefit.
Most of the gadgets in the article are not available to many or most of the earth's population but a cutting gadget, sewing gadget, and control of fire shaped provided for our species survival.