In Rolling Dice, the interior of the game box becomes a dice arena, with a cardboard ice floe stuck in place to give you a spot upon which to land your dice and one side of the box removed to make it easier to roll your dice.
Each round in the game, you roll three or four dice onto the ice floe. If you rolled four dice, then you choose one die to leave on the floe, removing the other three dice from play. If you rolled three dice — because one of your dice was on the ice floe from a previous round — then you must choose a just-rolled die that has a higher number than your previously-placed die or a just-rolled die that has gone farther on the ice floe than your previously-placed die. If you throw all your dice too hard and land in the "water" around the ice floe or you fail to roll higher or farther than a previously-placed die, then you place one die as a penalty on an ice block to the side of the board.
Once all players have rolled in a round, whether with three dice or four, players score. Whoever has a die on the ice floe scores points equal to the sum of the pips showing on their die AND all the pips showing on dice that didn't go as far on the ice floe AND all the pips showing on dice out of play on ice blocks. Score bonus points if you're on a fish net and lose points if you're on an ice hole. (If you have a die on an ice block, you do not score this round.) Thus, the farther you roll on the ice floe, the greater your scoring potential — not to mention the potential of landing in the water.
After scoring, start a new round beginning with whoever was first to place a die on an ice block, with all players once again rolling either three or four dice. The game ends the round that a player reaches or exceeds a certain point threshold, then the player with the most points wins.