While waiting for my car to be serviced in Johannesburg, I noticed a group of guys in the waiting area all playing the same game on their phones. The sound of balls dropping caught my attention, and when I asked about it, one guy showed me how it worked. What I like is how it doesn't need WiFi - perfect for when I'm traveling through areas with spotty reception. The plinko version works smoothly even on my older smartphone, which is great because not everyone in SA can afford the latest devices.