The 'Maleficient' star's 13 designs are the etching of the birth coordinates for each of her children, who were born all over the world, in Cambodia, Vietnam, Ethiopia, Namibia, and France, reported Us magazine.
"They are obsessed with her tattoos and always ask what they mean and she is happy to explain her tats to the kids," a source said.
Shiloh is apparently fascinated by her mother's ink and Pax is already eager to get his own.
"Angie tells him he has plenty of time," the source added.