Four baby Galapagos tortoises made their public debut Wednesday at the Philadelphia Zoo. They are the offspring of the zoo’s oldest residents, a female named Mommy and a male named Abrazzo, a pair of critically endangered Galapagos tortoises who have become first-time parents at the age of roughly 100.

The Philadelphia Zoo’s newest residents are officially accepting visitors. The zoo on Wednesday debuted its four female Western Santa Cruz Galapagos tortoise hatchlings, moving them to their public habitat for all to see for the first time.