I like the camera/album idea too! You could also look at the same sort of gifts that ring bearers and flower girls often get -- things like the silver-plated banks from Things Remembered; engraved ID bracelets, pendants, engraved trinket box, etc. They also make Family Unity jewelry -- 3 rings entwined to signify the family (
http://www.idotaketwo.com/shopping/J...edallion.html), or the modern looking mom, dad, and children sculptures. They are also old enough for a watch (there will always be "time" for you two) or a clock -- I have seen some cute football, sports car and "girly" table clocks. Not much time left, but you could put together a gift basket for each with smaller gifts, maybe some things to occupy them during the reception.