This book is an older children’s/YA book, set in small-town America. It was published in the 80s or earlier. The major competition in the town is which of two women had the larger ball of yarn/string. Everyone adds their spare bits to one or the other – I believe the POV character (a girl) brought the string from around a package to add to one woman’s ball.
Eventually, the town decided they needed to know once and for all. One woman’s was measurably a little bit larger, but there was the question of how tightly it was wound, plus there was the rumor that there was a peach pit in the center.
In the end, they decided to answer the question by unwinding each ball around a racetrack or something. I think they may have had to knock out walls to get the balls out of their owners’ houses. Partway through the unwinding one of the balls did indeed start looking notably peach-pit-shaped, and that’s the last I remember.
Thanks for any help!
