You can use themes or make each page different, it is all a matter of personal preference. One possible accent to consider is rubber stamps to create backgrounds. Sticker paper and sticker paper frames can add to the fun. Sticker papers can be found to meet any desired effect. You might want to consider letting the children decorate their own page of the scrapbook.
Athletes can find sticker paper that covers the sporting thematic.
The artist in the family may want to use metallic markers combined with traditional markers to decorate. Paper dollies can be used to frame a photo, by cutting out the center. Fabric can be used as a backdrop by simply going to the local copy shop and making a color copy of the selected fabric. This can be easily trimmed down to the desired size. Everyone involved in the scrapbook will feel terrific about giving such a creative and thoughtful gift.