Blend Glass

How can I get more creative with my centerpieces?
I bought some small glass bowls and some white floating candles for my centerpieces. How can I decorate them to make them look more interesting? My colors are pastel yellow and pink, and I am having my wedding at the butterfly house, so I would like to blend that in with my theme. Any help will be apriciated.
I use The Knot for all of my wedding idea needs. I have attached some links to pictures of spectacular centerpieces and also articles full of tips for DIY centerpieces and decorating with candles.
EDIT: I have found an even better link that offers ideas from a butterfly wedding….Just a second and I’ll attach it…
MIxing Glass Mosaic Tile Blend Sheets