Today I finished all the examples in the Sparkfun SIK Guide.
The SIK Guide Circuit #16 Simon Says diagram on page 84 appears to have an error.
It shows a picture of the Simon Says game sold by SparkFun, but something seems to be missing.
It looks like the picture of the game is missing one of the AA batteries needed to power the device.
I wanted to confirm this if true.
Please see the video https://youtu.be/e6IIO9GeUSs for details.
Please see Sparkfun Simon Says picture at https://www.sparkfun.com/products/10547