Rugrats (1991)

S2E46 Game Show Didi

Chuckie unintentionally swallows a watermelon seed, prompting the babies to imagine themselves exploring inside him to locate it. Meanwhile, Angelica schemes to plant the seed, hoping it will cause Chuckie to explode. Tommy intervenes to thwart her plan, and they successfully retrieve the seed. However, in a surprising twist, Spike ends up eating it at the end.