Franco,
So glad you like the Moms Panel.
The height requirement for Buzz Lightyear's AstroBlaster is 51 inches and it is for both the driver and gunner. I think the height requirement has to do with the seat belts used for both participants. I was at this attraction in April and the Cast Member was measuring ALL guests in the queue. If you go to Disney's website page for DisneyQuest (click
here), you can find the height restrictions for each attraction.
I hope you don't mind if I take this opportunity to offer some tips for you (and/or other readers) about another attraction there: CyberSpace Mountain (note: also has a 51 inch minimum). These tip only applies if you are an adrenaline junkie, like I am at times...
1) Avoid selecting any "fast" sections for your rollercoaster, since the attraction doesn't do a very good job of replicating the feel of speed (the image moves faster, but there is no physical sense of acceleration).
2) Try to maximize the number of times you can flip your car (not a good strategy, though, if you don't have a strong stomach!!). According to several Cast Members there, the maximum number of loops you can program is 13, and you can only do it in the "space" themed roller coaster. I personally figured out how to make 8 loops -- it still was a fun ride though!!
Lastly, be sure not to miss the "Pirates of the Caribbean: Battle for Buccaneer Gold" (35 inch minimum). It's one of DisneyQuest's best attractions. You'll likely notice that it uses very similar 3-D shooting technology as the new Toy Story Mania attraction at Disney's Hollywood Studio.
Whatever attractions you end up experiencing, I hope you have a great time at this "Ultimate Interactive Adventure" (as Disney describes it). ºoº