If you have simple curtain lace, I would like to offer you an idea to decorate it and make the window look interesting.

You need cockle-shell of different shapes, sizes and colors; thin fishing line; glue gun.
Now snip off the fishing line of necessary length, approximately 20-30 cm less than length of curtain lace. Leave alone the length about 10 cm from the edge and start gluing cockle-shells at a distance of 10-15 cm. The last one glue at the tip of the fishing line. Now take left alone at the beginning the tip and fasten it to a cornice fastening. Make the rest of pendants in the same way. You can make it in different length but try to hang it out on the equal distance over curtain.

Ready!!! Enjoy you handwork and coziness in your dwelling.