I find working with glass truly amazing. There are so many beautiful things that you can make, but it is not kid friendly. I found a few ideas that use kid safe mediums and give a glass like look. If you are in a classroom setting it is nice to introduce your classroom to glass artists like Chihuly and Tiffany. From Inner Child Fun this idea uses contact paper, tissue paper and wire.
Artful Parent uses paper and crayons to make this fun transparent bunting.
Here is another from Artful Parent using contact paper and colored index dividers
Life with Moore Babies uses silly straws and play dough. Fun thing about this one is you can make them over and over again.