Using these mecha toys is a lot of fun. First, you can play with each mecha in its two different modes. To change the mode, just gently move the parts according to the natural movement of the toy. When you want to combine them, match the red mecha with the yellow one and the blue with the pink. Make sure to align the connection points carefully. As for maintenance, keep them away from sharp objects to avoid scratches. If they get dirty, you can use a soft, dry cloth to wipe them. Also, store them in a cool, dry place to prevent any damage. Have a great time with your mecha set!