How to use: First, take out your Bakugan and the included metal BakuCores. Roll the Bakugan across the BakuCores, and it will transform with a pop - open action. You can use the included Gate - Card to add more fun to your game and earn bonuses. To build your own team, collect other Season 4 Bakugan Evolution toys, like Nanogan and Platinum Bakugan, which are sold separately. Attention: When playing, keep the small parts like the cards away from small children to avoid choking hazards. Also, be careful not to drop the Bakugan from a high place as it may break. Maintenance: Wipe the Bakugan and BakuCores with a dry cloth to keep them clean. Store the cards in a cool and dry place to prevent them from getting damaged.