Did you know you can use the Circuit Playground Express (CPX) with Code.org CS Discoveries course? Well you can now!
All you have to do is load up the "Firmata" firmware onto your CPX. Luckily, its very easy and you only have to do this once per device
Plug your Circuit Playground Express into your computer using a known-good USB cable
A lot of people end up using charge-only USB cables and it is very frustrating! So make sure you have a USB cable you know is good for data sync
There's a small button in the middle of the board. Try clicking it once, to put it into bootloader mode.
If clicking RESET once doesn't do it, try double-clicking (MakeCode requires single-click, Arduino requires double-click)
If the color LEDs turn all red, check your USB cable, try another cable or another USB port
Click this link to download FIRMATA yyyy-mm-dd.UF2 (the year, month, date may vary) and drag that onto the drive
The CPX will reboot automatically after a few seconds. The CPLAYBOOT disk drive will go away (you may get a warning from the computer that it didn't expect the ejection, ignore it!)
Your CPX is now ready to run Code.org CS Discoveries!