We recently went on a vacation with the family and as usual ended up with more seashells and other small momentos.  I made this shadow box for my daughter who can’t get enough of her shells.  The shadow box is easily found at any craft store.  I covered the back with colored paper and a fun patterned paper I found in one of our craft bins.  I put in a photo and some cute stickers appropriate to the theme.  The shells are mounted on the board with silicone glue.  This ‘raises’ them off the back and gives a floating look.  Silicone glue can be used to raise items to different heights so you can create a ‘stacked’ look and interesting grouping.  It too is easily found at your local craft or hobby store.