Sure; Terminal is handy for all sorts of stuff.
For someone just getting into it, just try navigating around and inspecting your system with the "cd" and "ls" commands. Try out editors like vi and emacs; try the interactive Ruby or Python shells; try writing simple bash scripts.
There's also a number of "easter eggs" that can be found with the Terminal, like:
- Type "telnet towel.blinkenlights.nl" to watch ASCII Star Wars
- Type "emacs", then Escape+x, and then "tetris"
As an aside, one of the most horrible pranks I've ever seen played on someone was recommending that they type in "sudo rm -rf /" into Terminal, followed by their password. This command is granted full administrative power ("sudo") and deletes ("rm") everything starting at the root directory ("/") recursively (meaning it deletes subfolders too) and without any prompting ("-rf"). Essentially, it wipes the entire drive. Haha, right?
Let this be a lesson to all Terminal newcomers: BE EXTREMELY CAREFUL ABOUT ANY COMMANDS YOU TYPE INTO TERMINAL IF YOU DO NOT KNOW WHAT THEY DO.