Linux resources
At my demo I used an preinstalled Ubuntu USB drive to show how to boot to a "Live Environment". While Ubuntu is a great beginner's distribution, due to the easy installer and a large helpful online community, you might want to create bootable USB for other distributions.
How to Create a Bootable Linux USB Drive: A Comprehensive Guide
Here's a great website that explains the top 8 Linux distributions and explains their features and why you'd want to try them.