Welllll as far as what is a peekaboo page. I have never done it in digi. bit if you print out you LO and put them in an album it will still work.
What you want to do is make a layout and after you place the page in the album you will make flaps that will go over the the photos. It will look as if it is part of the page with a cuit somthing on it that will lead the reader to lift it up and underneth is a Peek-a-boo
You can also do it this way
Make your whole layout no photos. Then in the layout you will put slits and the photos will pull out from be hind the LO dose that make sence. It is sort of a take on the childrens lift the flap books.