Creo Parametric includes the capability to share your CAD design with Creo View, a lightweight viewing tool for Creo. The Creo View files are much smaller than the original CAD files and can be easily shared via email or file sharing. Creo View comes with some nice rendering option and the "tumble" capability which makes booth demos and explanations of your CAD design much easier than loading the full CAD model in Creo Parametric. Try it out!
PS. If you're not sure where to get Creo View, visit your Windchill project and check the Software Downloads link. Creo View is available to everyone participating in FIRST, its only available from your Windchill Project and it does not require any special licensing. It can be installed on just about any PC, but it does not support MacOS at this time.
