Pretty balloons weights to buy. They fix your balloons to the table and tie in with your colour scheme. Float the balloons about head height and you will be able to see and talk to others at the table. Attach the ribbon to the weight and give the ends a good curling with a scissor blade. Balloon weights vary but bear in mind they are for indoor use and probably won't be able to hold a large bunch of balloons outdoors in a gale.