Honey, I Blew Up the Kid.

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.