To get an early start, you might download Scheme from:

http://racket-lang.org

and try a few things, especially from one of our texts:

http://www.amazon.com/Little-Schemer-Daniel-P-Friedman/dp/0262560992

Even though each of the chapters starts out very lightweight,
significant challenges await you.  (Similar to the recursive
red-black tree code in 2320.  At the end of this, you will
be certified as a "parenthesis manager" (for BSSwE) and/or 
"digital philosopher" (for BSCS)).

Somewhat more straightforward is JavaScript, which has its own
world of fun.  It is built into every useful browser and you can
play with it at:

http://www.w3schools.com/js/default.asp

Besides their convenient tutorial interfaces, you might also try
editing your own html/js and then experience the JavaScript debugging 
facilities of your browser . . .

If your favorite browser is Explorer, that will change on the
other side of the glass . . .

The lab assignments from fall, spring, & summer are still on the webpage:

http://ranger.uta.edu/~weems/NOTES3302/cse3302.html