The Bakugan game consists of rolling marbles that pop open to reveal little action figures. These marbles only pop open when they are rolled onto a metal card that forms part of the game. This game of strategy and skill can be played with any of the many different Bakugan marbles available that cost around £5 to buy singly. If your child is new to Bakugan, you will want to buy them one of the multi pack starter sets. The Battle Pack is great value for money as it includes six random Bakugan along with their respective metal cards. The other alternative is the Starter Pack which contains three of each Bakugan toy, ie marble and card. Each Bakugan is unique with a name of its own. Your child may want a specific one that their friend has or they have seen advertised on TV, or just one in a certain colour. Make sure you know before buying as these sets contain random Bakugan. The Booster Pack contains only a single Bakugan but again it is random. If you look on Amazon though, you can find and buy the exact ones that your child wants.