Nicky Harris of Pontnewydd said she handed her family's passports to authorities at the airport and only realized after the documents had been accepted that she had used a pretend passport belonging to her daughter Emily's stuffed unicorn instead of the actual travel document for the 9-year-old, the BBC reported Friday.
Harris said the toy passport, from Build-a-Bear, was stamped by authorities in the same way as the legitimate documents.
"It was an error on my part ... but nobody questioned it," she said.
The BBC did not identify the airport.
Notable deaths of 2014 [PHOTOS]