Using these Heroes Of Goo Jit Zu S10 Minis is a breeze! Just take them out of the box and start stretching and squishing. You can stretch their bodies up to 4 times their size and wrap them around each other for an exciting battle. When you're done playing, simply let them go back to their original shape. As for maintenance, keep them away from sharp objects that could tear their stretchy bodies. Also, avoid exposing them to extreme temperatures, as this might affect their stretchiness. If they get dirty, you can gently wash them with mild soap and water and let them air - dry. Have fun playing with your Goo Jit Zu Minis!