Amal's mother Baria, who was in London during the birth of the twins, was spotted visiting the E-Side boutique in the Gerrards Cross neighbourhood of Buckinghamshire, England, reported People magazine.
"She bought two romper suits in organic cotton. They are two sleep suits with a bear and rabbit. One of the romper suits is in gray with an image of a bear, and the other is in mint with a picture of a rabbit," a source said.
The source added that the rompers were part of a set of gift boxes, retailing for 26.95 pound each and also containing a hat and a bib.
This is not the first time Amal's mother has been seen buying gifts for the babies. In February, she was spotted buying children's books in London.