Ryder built this Lego robot from a plan he found on the internet. It has a built in sensor that tells it to stop, rotate to aim, and shoot small plastic balls at any object within 20 inches of it's path. After tolerating my help, he had to show me which pieces and how they went together, he connected to his laptop and programmed in the instructions to make it do what he wanted. Just think, it was only 60 years ago that I was content to be able to build a hoisting crane out of a metal "Erector Set" when I was his age. I wonder where all this will lead!
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