Currently, PyLeap requires Adafruit Boards to run Circuit Python on its board. If you haven't already, you'll need to download the latest version of CircuitPython from the link below.
Plug your Adafruit device into your computer using a good data-capable USB cable.
Many people use charge-only USB cables, which is very frustrating, I'm sure! So make sure you have a USB cable suitable for data sync.
Double-click the small Reset button on the Adafruit device (indicated by the red arrow in the image).
A LED will turn red, and then it will turn green. If they turn red and stay red, check the USB cable, try another USB port, etc. The tiny red LED next to the USB connector will pulse red - this is ok!
If double-clicking doesn't work the first time, try again. Sometimes it can take a few tries to get the rhythm right!
(If double-clicking doesn't do it, try a single click!)