Much of this movement is to regulate the contents of the cell. This includes bringing material into the cell from the extracellular environment or the plasma membrane (endocytosis) or releasing material made within the the cell to the outside (exocytosis).
It really is an easy project...it just takes a little time. All and all, it took me about 6-8 total hours to make 4 bouquets, 10 bouts (my mom made those though) and about 15 centerpieces. I made two bouquets the day before our wedding and the other two the day of the wedding.
Adding up your dollars: If you are spending $5.00 per brooch and it takes 25 to make your bouquet, that puts you at $125 before you even start building the thing. Brooch bouquets made by one of my brides for her May Vintage wedding.