http://www.greatbusinessschools.org/10-great-inventions-dreamt-up-by-children/
http://www.timeforkids.com/news/coolest-inventions-2015/335121
http://science.howstuffworks.com/innovation/scientific-experiments/9-things-invented-or-discovered-by-accident.htm
http://mag.amazing-kids.org/non-fiction/stories/inventions-that-were-mistakes/