Claudia isn't worried when she hears her newest baby-sitting

charge, Betsy Sobak, is a big practical joker. After all, how

much harm can one little girl do?

Plenty. Claudia breaks her leg as a

result of one of Betsy's jokes. Now Claudia is feeling like baby-sitting

might be too dangerous and she's talking about quitting the

club! Kristy thinks Betsy needs to be taught a lesson, and that

the baby-sitters are just the ones to do it.