Using this card trick set is super easy. First, open the box and take out the cards and the instruction booklet. The booklet has clear pictures and step - by - step instructions that are easy to follow. You can also download the Marvin's Magic App for more help. When performing the tricks, make sure you're in a well - lit area so people can see the cards clearly. Try practicing the tricks a few times in front of a mirror to get more confident. As for maintenance, keep the cards in the box when not in use to prevent them from getting dirty or damaged. If the cards get a bit dirty, you can gently wipe them with a dry cloth. Have fun amazing your friends with these cool card tricks!