A guest book doesn’t have to be in the form of a book. The bright hues of these small gift cards can’t help but bring good cheer to your guests. Their small size gives your guests just enough space to write a sweet thought, quip, or hope. Use a clear vase or bowl to hold the sealed envelopes. After the wedding, the opened envelopes can be glued facedown into an album so that the cards can be easily removed and reread.