How to use: First, if you have the DX GotcharDriver, insert the Ride Chemy Trading Card into it to bring the fun to life. For the SanSeater, you can easily detach the Yaruka and combine it with the Killer Robo if you own one. Note: The DX GotcharDriver and Killer Robo are sold separately, so you'll need to buy them if you want to use all the combination features. Maintenance: Keep the cards and toys away from water and sharp objects. You can gently wipe them with a soft cloth if they get dirty. This will help keep your collection in great shape for a long time.