Some of the old LucasArts/LucasFilm games can be tinkered with by putting in the debug mode.... Yeah! Just like us.
Anyways, heres the original news post http://www.mixnmojo.com/
and here is the place to learn about how to skip around scenes and such, with pretty pictures...so if you wont bother to actually play with debug, at least go to look at the pictures.
http://www.lucasforums.com/showthread.php?s=hreadid=97859
You can do that in some sierra games too, I can't remeber how but if you type in a word in Hero's Quest 1 (QG1) and QG2 you can enter debug mode, probably other games too.
I think they left them in on purpose just for fun and to see if anyone would accidently type it in
edit: in HQ1 type "razzle dazzle root beer"
then you can use:
RESULT CHEAT CODE
Add up to 999 in money [Alt] + B
Edit single skill [Note 1] [Alt] + K
Edit inventory items [Note 2] [Alt] + I
Teleport to specific location and time [Alt] + T
List sprites [Alt] + S
Ego status [Alt] + E
Display background and foreground objects [Alt] + P
Display memory usage [Alt] + M
Exit cheat mode [Alt] + Z
Exit cheat mode [Alt] + X
I found it here with google http://www.cheatcc.com/pc/questforglory.html
It also gives the numbers for all the skills and inventory items to play around with.
This is quite nifty. Although I'm disappointed there aren't more games listed.
"Suck blue frog" was QfG2, iirc. You'd have to Google to find all the codes though, I don't remember them off-hand...