I am a MakerSpace organizer, and have introduced hundreds of people to Arduino programming using the Grove system. I found trying to explain breadboarding, basic electronics and programming up front to be too much at the same time; Grove plug-and-play modules really helped out.
I have built a display of 48 projects at the MakerSpace which utilize several dozen Grove modules so visitors can come and learn at their pace; each in a pencil box with all of the parts needed to explore sensors, motors, etc. with Arduino and Raspberry Pi. https://48projectsblog.wordpress.com/
I made a smaller version of this for libraries called 36 Projects; I do not know how many libraries are using it but my site gets 300 hits per month: https://36projectsblog.wordpress.com/
Grove has made a BIG difference in bridging the gap between the novice and technology and is great for rapid prototyping.
James
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