Moms love things of nostalgia that can help them to remember the times when her kids were little or certain events that were fun, etc. Find a picture or a series of pictures that you think will be particularly significant to your mom and make a small memory book. Or you can make an enlargement of a picture and make your own frame or decorate one that you buy. Smaller children can make their picture frames for mom out of Popsicle sticks and glue. As long as you stay true to the sentiment of the gift, mom will love it.