A family of porcelain dolls that has lived in the same house for one hundred years is taken aback when a new family of plastic dolls arrives.

During the summer before their seventh-grade year, Kristy, Mary Anne, Claudia, and Stacey tackle difficulties, including family problems, crushes, moving, and making new friends.

Things go awry when Annabelle, a fragile, timid porcelain doll who lives in a Victorian dollhouse, tries to share some of her Christmas traditions with best friend Tiffany, a sturdy, adventurous plastic doll who lives in a modern dollhouse.

Five-year-old Olivia's new neighbor Rachel is in her kindergarten class, and they must oercome feelings of jealousy and competitiveness to be friends.

Nine-year-old Pearl and her popular, thirteen-year-old sister, Lexie, do not get along very well, but when their grandfather moves in and the girls have to share a room, they must find common ground.

It's the first day of a new school year, and while Mary Anne doesn't know what to expect from the eighth grade, she's looking forward to getting back into the swing of things. One thing she definitely doesn't expect is to meet Logan Bruno, who just moved to Stoneybrook! Logan has a dreamy southern accent, he's awfully cute... and he might be interested in joining the BSC. But the baby-sitters aren't sure if Logan would make a good club member, so...

When a fight breaks out among the members of the Baby-sitters Club, timid Mary Anne finds herself becoming more assertive as a babysitter and in her relationships with her father and friends.

Coping with diabetes and facing countless babysitting dilemmas, Stacey makes three friends who welcome her to her new town with open arms. But do they have what it takes to beat another babysitting club at it's own game. ¿Alguna vez has tenido un secreto que te avergonzara contar? ¡Pobre Stacey! Acaba de mudarse de ciudad, está acostumbrándose a su diabetes y, por si eso fuera poco, no dejan de surgir contratiempos en su trabajo de canguro. Por...

Mary Anne should never have thrown away that chain letter she got in the mail. Ever since she did, bad things have been happening to everyone in the Baby-sitters Club. With Halloween coming up, Mary Anne's even more worried -- what kind of spooky thing will happen next? Then Mary Anne finds a new note in her mailbox: Wear this bad-luck charm, it says. OR ELSE. Mary Anne has to follow the note's instructions. But who sent the charm? And why did they...

While baby-sitting for practical joker Betsy Sobak, Claudia breaks her leg as a result of one of Betsy's pranks and wants to quit the club, prompting Kristy and the other baby-sitters to teach Betsy a lesson.