You should take a look at the main Bakugan site, it has a section that will answer most of your questions about Bakugan. Look for the FAQ in the Gameplay section.Here is the excerpt about Traps.3.01: What is a Bakugan Trap?Normal Bakugan are round and they roll. Bakugan Traps are not round. They come in all kinds of shapes and sizes like football, pyramid, coin, cube, drum, and tetradecahedron.3.02: How many Bakugan Trap can I use in a game?You can use up to one Trap in your unused pile at the start of a game. It goes in with your three Gate cards, three ability cards, and three Bakugan.3.03: How do you play a Bakugan Trap?You may play one of your Trap during a battle as long as the Trap and Bakugan have the same attribute. For example, if you are using a Pyrus Bakugan in that battle you need to use a Pyrus Trap.To play your Trap during a battle, take it from your unused pile and drop it onto the Gate Card engaged in battle. When it opens up you will see one or more attribute symbols revealed inside it. You will now change the attribute of your Bakugan to any one of the attributes printed inside your Trap.Some Bakugan Traps have one hidden attribute symbol. Some have two hidden attribute symbols or more.Only when you've run out of Bakugan in your unused pile and are about to roll should you move your Trap back to your unused pile.Also included with your Bakugan Trap are their very own ability cards. When you combine the affects of the Trap with the affects of their Ability Cards the power can be devastating.Download the latest official Bakugan rules here.3.04: How come some Traps have a repeated attribute? Does it do anything special?Traps with duplicate attributes printed on them do nothing extra special. They work the same as a regular Trap.