I have also seen similar centerpieces that use epsom salts instead of sugar. You could also sprinkle a mix of pearls/gems. Sand (or sugar), faux pearls, a 3 candle. An easy DIY wedding centerpiece idea.
Lighted twig screen has multiple uses by day and by night. You will need to collect some twigs and sticks then lay them out to weave together on a frame built of sticks. Personal patterns and tastes will emerge as the twigs will seek their own balance.
Balloons taped to a wall to resemble by bubbles. This would be awesome at a bridal shower or another kind of party with a champagne bar. Love this idea! Use pearlescent colors for an adult party and primary colors for a kids' party.