We are having approximately 300 guests at our reception. With round tables seating only 8 people each, we are going to have to do centerpieces for 38 tables. I'm trying to figure out a way to not spend a fortune. My current thought is to buy vases from the dollar store, put an LED light in the bottom, fill the vase with yellow water beads (our colors are yellow and gray), and put a plate of cupcakes on top of the vase. The cupcakes would serve as both the centerpiece and cake as we are only going to do a small cake for us to cut. Opinions? Does this seem ok to do?