Honey, I Shrunk the Kids S01E01 - Honey, We've Been Swallowed by Grandpa

Wayne, Diane, and Amy are accidentally shrunk to near-microscopic size. Soon after, Grandpa Murdock (Eugene Roche) drops by to pick up his grandson for a fishing trip. Nick feigns illness to avoid going with his grandfather, who then leaves, but not before inadvertently swallowing his mini-relatives—van and all. Nick interprets Wayne's help message in the newspaper and realizing what has happened, rushes to his family's aid.