Olive Oyl runs a “health farm for children.” Olive and Popeye try to serve spinach to the kids, but they’re sick of it, and Popeye can’t convince them it’s good for their health. So he turns into Johnny Spinach-Seed, spreading spinach everywhere and making plants and animals bulk up. (Hey, are their steroids in that stuff?)
When one of the kids feeds spinach to a couple of emaciated cows, they turn into huge bulls and terrorize the kids. Popeye gets his fix of the green stuff, knocks out the bulls, and inspires the kids to eat their spinach. Soon enough, they’re miniature Popeyes tearing apart the countryside (was that what Popeye hoped to achieve?).
Another entry that’s more funny/cute than funny/ha-ha. Lock those kids up before they form a gang.