Take a sheet of contact paper, or some regular paper painted with glue, and make a summery collage by sticking natural materials to it. You can make the stick more permanent by covering with spray adhesive later.
My Favorite Shady Ground Cover -- If you have a shady or partial shady spot, and you want to fill it in quickly (within 8 weeks), then you will like Lamium Beacon Silver or "dead nettle." Don't buy flats...find someone who has it (me!) and take cuttings. You can just stick a stem or even part of a leaf in the ground, and it takes root and fills in rapidly! It flowers from April to October...I love my patches of it!