Cloudlike clusters of balloons make great DIY table centres. They are easy and inexpensive to assemble - all you need to do is fill white pearlescent balloons with helium and attach lengths of ribbon (all available from www.talkingtables.co.uk) before securing with faceted glass weights (brand new from www.talkingtables.co.uk). At the end of the wedding reception, ask your guests to untie the balloons and release into the sky for a cool alternative to a firework display.