Super easy, super quick, and really important!
If you have a young one, it's nice to have important phone numbers on hand JUST for them and not just on your fridge. I made this up for my 6 1/2 yr old.
4x6 cards, printer, family/friend photos, book ring
(optional: stamps, ink, ribbon)
Ours only has 4 pages, for both sets of grandparents, Daddy @ Work, and Emergency. I printed them out, stamped a couple of images on the front, distressed the edges, and secured with a book ring. I tied on some scrap ribbon. You could also use brads, yarn, or staples. For younger kids, I also would have 'laminated' it with clear contact paper.
There you have it!
Have a good one!