This is almost as fun as legos at 4:00 AM! These are floor drying mats. Each nipple is connected to vacuum. It pulls air through the cracks from under the hardwood to encourage evaporation. This alll has to come out Saturday morning at 6 to allow setup for a wedding. Then it goes back down. We hope there is less beer and other sticky substances all over the floor Saturday night than there was this time. We learned a good lesson here this morning. Next time we will Make sure we schedule to come in AFTER the cleaning company is done.