Storyline: Wayne Szalinski is at it again. But instead of shrinking things, he tries to make a machine that can make things grow. As in the first one, his machine isn't quite accurate. But when he brings Nick & his toddler son Adam to see his invention, the machine unexpectedly starts working. And when Adam comes right up to the machine, he gets zapped along with his stuffed bunny. Now, whenever Adam comes near anything electrical, the electricity causes him to grow. Adam soon starts to grow to the height of over 100 feet. And he is now walking through Las Vegas which he thinks is one big play land.
Storyline: The scientist father of a teenage girl and boy accidentally shrinks his and two other neighborhood teens to the size of insects. Now the teens must fight diminutive dangers as the father searches for them.
Storyline: Mystery, Inc. heads to Blowout Beach for a real swinging beach party. But when the Ghost Pirates threaten to harsh the good vibes, it's up to the Scooby Gang to get the party back on track and save the day!