High speed #M&M sorting machine
▻http://www.reviewmylife.co.uk/blog/2014/12/22/high-speed-mandm-sorting-machine #Arduino
Or this one, built with #Lego #Mindstorm... ▻https://www.youtube.com/watch?v=sVZQkEzXInM
And this one is dual-purpose - it has a setting to sort M&M or #Skittles !