updated 11/29/2013 AT 8:20 AM ET
•originally published 11/26/2013 AT 4:30 PM ET
The pair has stayed curious and busy – enjoying belly rides, cuddling in their mom’s lap and playing with leaves – since their births on Aug. 9 and Sept. 26. The brothers have different mothers, but were both fathered by a 21-year-old baboon named Bole.
On most days, they can be found doing anything and everything adorable at the zoo’s Animal Lifestyles building. Names have not yet been chosen for these furry friends, but we’d love to hear your ideas! Leave your suggestions in the comments below.