Pop-up books are fun, but...

They may not be doing the job when it comes to education, which of course is the reason many of them exist. In one experiment, 'Those exposed to the book with the photographic images were able to correctly identify their bird nearly 80 percent of the time. Those who saw the book with the drawings did so around 70 percent of the time. But those who were entertained by the pop-ups did so only 50 percent of the time — no better than chance' More... (Via.)