A POPULAR children’s book taught in thousands of schools across the UK features rude secret drawings and sex references â€” including an apparent DOGGING scene.
Read With Biff, Chip And Kipper is a series of books for kids from the ages of 3 to 7 designed to help teach literacy.
But its creators slip in naughty hidden hints to give parents and teachers a giggle, it has been revealed.
In one book, whose title is not known, the character Wilma dashes through a park while a group of three adult men can be seen talking behind a bush.
The next page shows Wilma with a net in a river. In the background a startled old lady spots whatever the three men are up to in the foliage.
In another book, a schoolchild is stacking up lettered blocks that spell out the sexually transmitted disease hepatitis.
There are over 400 Oxford Reading Tree books including the Biff, Chip And Kipper series.
They are are taught in around 80 per cent of British primary schools, according to publishers Oxford University Press.
“Created by educational experts, the series stars Biff, Chip, Kipper and Floppy the dog â€“ the much-loved characters from the Oxford Reading Tree”, its website says.
Illustrator Alex Brychta was awarded an MBE in 2012 for his services to children’s literature.
He collaborated on the books with author Roderick Hunt, a divinity graduate who was also handed an MBE in 2008.
Most people responded positively to the cheeky references.
Steven Van de Velde wrote: “Kids don’t really notice it, adults will get a chuckle from it.
“Since adults often have to narrate or guide these books, it’s fun.”
But others didn’t see the funny side.
John Smith fumed: “What sort of twisted halfwit draws this kind of crap in a kids book?
“What corrupt company things it’s fit to print?”
The Sun has approached Oxford University Press for comment.