Is it real or is it glass?

When I was in Miami visiting my Uncle Ted and his family, I got to see one of the neatest gardens ever. They were having an exhibition of work by a glass sculptor named Chihuly at the Fairchild Tropical Garden. Mixed in among the ponds and the gardens were glass balls and plants by the artist. I loved the colors and the patterns. I was very good at figuring out which things were glass and which were real. Here are a couple of pictures.