STEMERALD CITY has been one of the factors that I attribute to my sons growth & excitement about all things electronics, coding & robotics. Almost 3 years ago,I presented Mr. Epps with a 7 year old who had had enough with Legos and wanted to make his own robots. My son is now a STEMERALD CITY Advanced Remote Pilot and a kid who spends hours in his room coding and building his own creations with 1.5-3V motors, gears, battery packs and recycled materials. I highly recommend STEMERALD CITY!