How to use: To see Rockjaw's curse transformation, simply submerge him in ice - cold water. You can also stretch his arms and legs to enjoy his super - stretchy feature. Have battles with other Heroes of Goo Jit Zu figures and use Rockjaw's golden weapon in play. Attention: Keep the figures away from sharp objects to avoid tearing the goo inside. When not in use, store them in a cool and dry place. Maintenance: If the figures get dirty, you can gently wash them with mild soap and water, then dry them thoroughly. Don't expose them to high temperatures as it may affect the goo consistency.