Using the Transformers Earthspark Spin Changer Optimus Prime and Robby Malto action figures is a breeze. First, to convert Optimus Prime from vehicle to robot mode, take 3 manual steps. Once you've done that, connect the Robby Malto figure to Optimus Prime's shoulder. This will trigger an exciting spinning move that completes the conversion. When you want to change it back to vehicle mode, just follow 12 manual steps. As for the Cyber - sleeve shield accessory, you can attach it to either Robby Malto or Optimus Prime for added fun. Keep in mind that the Robby Malto figure doesn't convert. When not in use, store the figures in a cool, dry place to avoid damage. If they get dirty, you can gently wipe them with a soft, dry cloth. Have a great time playing with these amazing action figures!