The sandbox is where the dicing happens, and you usually need RSGP of either 07 or RS3 to start, as they won't take your paypal unless you're trusted. You can either straight roll which is the host rolls a 5 sided die and you roll. Whoever rolls higher wins, but if it's a tie the host wins. And then there's 59x2 or some do 57x2. I usually go with the 5 sided die (called a "straight roll") and I've had huge success with it. Won about 3b just yesterday on straight rolls. you can look through my posts, I'm a pretty avid dicer/gambler