If you can get the pictures you could do something like a scrap book. or lockets with a picture in it or a charm bracelet but have the charms be different things that symbolize your time. Example one be of a baby rattle then, a cup of coffee, small picture of their child, etc. Hope this helps
They both like to read how about book covers and a matching book mark? I made my mom a quilt she is a computer addict! LOL If they have an electronic reading device (Kindle, Nook) a cover or carry case should be pretty simple.