To appeal to the new users it would be useful to demonstrate the diversity of open-source desktop environments with pre-installed software from a LiveUSB or from an external portable hard-drive.
By installing the MultiSystem DEB package on Linux Mint you can easily create bootable USB drives
with as many Linux ISO
files as you can fit on the available space.
can be used to switch on-the-fly (without logging out!) between different desktop environments and X window managers you have installed.