I lead a 4H club focused on Maker themed projects. We build Rube Goldberg machines and build other crazy things. I have always found Serial Addressable LED very interesting. At the same time I wanted to do a project with the club around arduino's for this year. I have also been thinking about building a display for the 4H barn for a couple of years. The main issue was the cost was on the the high side. The cost has come way done recently. I also realized that there was a lot I didn't know about trying to build a project this large. I needed to build a smaller project and discover what I didn't know and if I could solve the problems. I built a small 20x15 matrix LED board and realized it was more fun then I expected. I knew right then I had the 4H project I was looking for. I also learned a lot. I experimented with different Arduino libraries, NeoPixel, NeoMatrix and FastLED. I also found that soldering the connections was tedious, tested the quick connectors, but found that with the quick connectors I saw lots of voltage drops. I didn't see this with the soldered connections. I was very very interested in getting a handle on how to handle power. If I was going to build a very large display I wanted to make sure I had a solid idea how I was going to power the entire matrix. I also broke down the project into phases, Phase One had to be done by July 21 2019. I need to mount the LED Display in July, if not done by this time I will have to wait a year. Things like a diffuser would have to wait until the next year. I need the ability to enter new "phrases" form a keyboard. I would like to use a USB keyboard and not a Din connector keyboard. I need a strong box to mount the LEDs and the Arduino's and power supplies. I am very concerned with Power, the environment of the barn is very hot no AC. I want to make sure the power supply will be able to work for 10 straight days working 14+ hours a day. The interface to update the displayed "Phrases" needs to be easy to use, I may not be there all the time. I also want to have the 4H kids build as much of the display as possible, and be involved in the programing. This requires a lot of prep work, I need to have worked out the details before have a club build session, so we can make the best use of our limited time.