Shaun the Sheep (2007)

S1E29 If You Can't Stand The Heat

Timmy unintentionally consumes a tomato fertilized with Miracle-Grow, transforming into a colossal sheep resembling King Kong. Shaun takes on the challenge of hiding the enormous toddler while searching for a way to shrink him back to his usual size. Ultimately, a Duck gets hold of the same growth spurt, resulting in it growing even larger than a house.