Thank you for viewing. This is a bath book from "Shina Pusu." The black parts disappear and the pictures change when warmed with hot water or a hairdryer (see images 3 and 4). They return to black when cold, so children enjoyed playing with it. It's made of waterproof vinyl material with a sponge-like filling, making it slightly soft. When wet, it sticks to the bathtub or walls. There's a hole in the corner, so I always hung it on a hook to dry. It shows signs of use, but there are no stains, and I think it can still be used.