During Pup Pride Down Under week 2016, Sirius Pups held a workshop on human pup play for ACON Australia. Here is one the many videos created from that workshop.
This one is about the fundamental question of "what is human pup play?"
Of course, because so a few people fall over themselves to point it out - I shall write this disclaimer here -
THIS IS NOT THE ONLY WAY TO HUMAN PUP PLAY. IT IS NOT THE ONLY EXPLANATION OF WHAT HUMAN PUP PLAY IS.
Anyhow, the explanation in the video may be helpful and useful to you. I hope so. :)