corn hole sign, good idea for those who haven't played. Having games set up for outside after the ceremony while the wedding party is getting pictures taken would be easy and fun, lawn games might make for a really fun cocktail hour
Pick a few of your favorite blooms. Then, find some twine and tie a double knot at the end of each stem and repeat fastening the other flowers. Once you have about six finished strands, knot them to a twig or branch.