Child prodigy, Blaise Pascal was only 12 years old when he developed the first ever calculator for his father who was a tax collector. It was named the "pascaline" and was initially the size of a shoebox and function using a series of toothed wheels turned by hand. For the record, Blaise also invented probability theory, the syringe and even roulette.
Known for her activism and involvement with rights to education and rights for women specifically in Swat Valley in Pakistan. Malala was going up against the Taliban enforcing their rule of banning girls from going to school. At 15 years old, she endured a bullet wound to the head after defying Taliban orders and upon recovery from a coma, she continued to insist that the united Nations sent books and pens instead of battalions and grenades. At 17 years old, Malala became the youngest person ever to be given a Nobel Peace Prize.
At only 15 years, Colvin raised her voice against segregation in 1955 when she refused to relinquish your seat on a segregated bus. Upon being arrested for this "offense", she challenged the absurdity of this law in courts where it eventually led to a supreme court order to outlaw segregation on buses everywhere.
British Columbia's Ann Makosinki is a young inventor who was able to invent a flashlight that runs purely on the heat of the human hand alone. She used peltier tiles for the thermoelectric component. When one side is heated and the other side feels cool albeit air. Electricity is conducted and the flashlight was able to function perfectly without batteries.
At only 19 years ago age, Slat of the Netherlands came up with the Ocean Cleanup Array, processing platforms that collects floating plastic debris in our oceans. It's designed to only collect the rubbish but avoid marine life like fish and plankton that will simply pass through and unharmed. His idea gained worldwide recognition due to his theory that his invention can clean up twenty billion tons of plastic from the world's oceans in only 5 to 10 years.