This didn't seem to do anything for me. I clicked on the kid I thought was in trouble and the video just paused. When I continued the video, I saw that I had in fact chosen the right kid, but I didn't see any way to interact with it at all, or acknowledgement if I had the right kid, etc. Windows 8, Chrome, ???
The tool is not interactive. It's purpose is to see whether you can spot the kid. If not, then you can re-run the video and look at the symptoms and familiarize with it. You can play other videos and try at spotting. The primary takeaway is that it's incredibly difficult to know when someone is drowning and this helps you understand that and be attentive next time you are near a water body.
