Floating Flower Tip - Most flowers float pretty well on their own until they start to pool with water and slowly sink. For a longer lasting centerpiece, use bubble wrap to make little skirts for your flowers.
Breathe Easy: 5 Pretty Houseplants that Improve Air Quality
~Garden statue~ I'm gonna admit that this is kinda creepy.but I think if it actually turned out that it would be sorta pretty. (Cut the back half of the doll's head off and fill the front piece with cement for a sculptured doll head for your garden.