Rope lighting around the concrete border.
Use tape to measure between the two holes and then put the tape on the wall.
Paint in ziplock bags, taped to table. Great distraction, no mess!
"Watermelon soaked in tequila and dipped in coarse salt...a margarita you can eat!"
DIY party lights! http://www.thesurznickcommonroom.com/2014/02/ping-pong-ball-lights.html
Clean out an old lotion bottle and hide your phone, money, & keys in it for your beach bag.
This simple project is made by soaking cloth doilies in sugar starch and then forming it around a balloon. One the starch dries, pop the balloon and you have a romantic tea light holder.
Too Cute for a Baby Shower