I have – in collaboration with Lasse Folkersen (Lead Scientist at Skt. Hans Hospital in Denmark) – made this animation that describes how to come from a spit sample to genotyping with help from a DNA microarray. (Watch with sound).
The animation has also been placed on the Wikipedia article about DNA array:
https://en.wikipedia.org/wiki/DNA_microarray
Where it – in addition to english – can be found with danish, swedish, spanish or chinese speak.