Getting surreal by the day.
The stick-like product is called "Air Counter", and it is a simplified radiation survey meter made by S.T. Corporation. You can buy it at drug stores and convenience stores nationwide for 7,900 yen (suggested retail price). In this ad, the "Air Counter" is being sold with the book written by Professor Kunihiko Takeda of Chubu University, who has been speaking out since the early days of the nuclear accident last year to protect children.
"To protect your children, it's important to measure the radiation levels."
"Radiation contamination can be reduced for your children" if you follow the methods detailed in the book.
The photo shows the ad on the train, I think.
What's next? Full-face masks for children, perhaps? (Just like the movie "Blind" ...)
(H/T Chibaguy for the photo)