With ParellelAlbum, you can easily access photos of your each child at the same month age.
Features:
Album for child - Sorting your child’s photos by his/her month age.
Multiple children - Handling up to six albums and switching easily from a child’s album to another.
Quick access - Fast scrolling with month age scroll bar or jumping to the current age of each child with “Now” button which appears by touching month age scroll bar.
Notice:
This app does not provide a function to classify your children’s photos into the sets of each child’s photos. It is desirable to work with iPhoto’s Faces or something like it, but you can select one album such as camera roll and assign different DOBs to it for two or more children.