Cited as a reference
SparkFun RGB and Gesture Sensor
Why people recommend it
A short product demonstration of the APDS-9960 gesture and colour sensor, linked when people want a cheap way to detect hand movements.
Watch for: Very short demo, not a wiring guide
In their words
Looks like there's a YouTube video as well.
st2000 on arduino.stackexchange.com, May 2016. CC BY-SA.