Ok. You didn't mention if this "Final year project" is for a certain class, an entire Linux administration course, or a whole career.
Assuming either of the first 2 options that I just mentioned, I would do 3 things integrated into one:
1) Set up a samba share that can be accessed from Windows / Linux / Mac boxes. Add screen caps from each system showing how it works. Consider the possibility of adding network printers as well using samba or cups.
2) Using network devices (such as printers and other Linux boxes), set up a NMS (Network Management System, such as JFFNMS, Nagios, Icinga, Zabbix, etc) to monitor those network devices.
3) Set up a firewall / proxy / mail server using iptables / Squid / Postfix.
Well, I think that would be it. Hope any of this helps

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