Using the cards found in two or three of the Boomerang games, players will be able to use the Around the World expansion to do a world trip - travelling to Australia, Europe and the USA in the one game. The cards included function like promo cards that can be added into a play of any of the Boomerang Family games. But that's not all! The mini-expansion will contain rules for solo play and for a 5-8 player variant as well. The expansion is simply 6 cards with a rule book shrink-wrapped together. The cards are 2 promos for each of the 3 Boomerang games (but they can be played within any Boomerang game) that also work with the variants in the rules. - From the Kickstarter