[Brown Bear Family's Bath Picture Book] Let's play with Marble-kun in the bath!

Enjoy a fun bath time with your favorite picture book!
Even children who hate bathing will definitely enjoy taking a bath.

It uses black ink that disappears depending on the temperature, and when you put it in the bath, the picture changes and you can see the answer to the riddle.
If you take it out of the hot water and wait for a while, or soak it in water, the picture will return to its original state.

It comes in a blue Marble-kun box, making it the perfect gift.