Just getting my feet wet with research and reading. I recently subscribed to Hacker Boxes. I'm a photographer, lighting guy and color corrector by trade, but I'm interested in fun stuff to do in general and for kids projects too.
The official forums are nice:<p><a href="http://forum.arduino.cc/" rel="nofollow">http://forum.arduino.cc/</a><p>Reddit has a good community too, it mostly has people posting their finished results with varying degrees of implementation detail.<p>I've only recently finished working my way through the official starter-kit project-list - so I'm only a beginner myself - right now I'm just waiting for a bunch of new sensors/hardware to ship from AliExpress. Hopefully once it does I'll be able to build an MP3-player, NTP-based clock, etc. Nothing too novel, but fun regardless I hope!<p>Finally <a href="https://www.hackster.io/arduino" rel="nofollow">https://www.hackster.io/arduino</a> has a few nice projects, as does instructables. As with any of those kind of sites the projects/clarity vary.