To use these Heroes of Goo Jit Zu Stretch Strikers, simply hold them in your hands and start squeezing and stretching their bodies. You'll feel the unique goo inside. For battles, pit Sir Thrashalot against Barbarian Redback and use their stretchy abilities for an exciting play. Remember, these toys are for kids aged 4 and up, so make sure younger children are supervised. To keep them in good condition, avoid exposing them to sharp objects or extreme temperatures. If they get dirty, you can gently wash them with mild soap and water and let them dry thoroughly.