Weighing of the wands: Significance

I was re-reading The Goblet of Fire, and just finished reading the bit about the wand weighing ceremony that takes place before the triwizard tournament. It has me wondering whether, the things that shot out of each of the champions’ wands meant anything. Fleur- flowers Krum- a gun shot and birds Cedric- silver smoke rings Harry- a fountain of wine Does it signify anything or is it just something random? Would love to hear your theories and answers