Tiny is horrified when her favorite buttercups all wilt, so Mom takes her and the family to the Big Pond, where she remembers seeing a whole lot of buttercups in bloom. On the way there, the Conductor gives the kids a visual lesson in "Nature's Life Cycle," explaining how a flower grows, blossoms, then wilts, and returns its seeds to the ground, to start the cycle all over again. Tiny finds her flowers at the Big Pond, both blooming and wilting, and can see nature's life cycle in action.