We tend to look at photos and in fact all media via digital devices (laptops, tablets, TV etc). For children though, you can't beat printed photos. My wife and I have had a little cardboard box for each of our children which we put various photos in - some duplicate photos from our wedding or when we were children, photos of the children we had framed for a while, pets, all sorts really. The children love sitting with the photos, asking questions about them, asking who some of the people in the photos are.
They also like watching family videos (which obviously is digital) but for me the real joy they get is from touching and holding the photos. Technology evolution is not a solution to everything.
So get printing!!!