All the mothers who have (collectively) toddlers belong to the same club.
Is that club called the mother and toddler's club, the mother and toddlers club? Or something else.
When the suject you have ends with "s" then the apostrophe is used after the "s".
If the subject does not have and ending "s" then you use the apostrophe and the "s" is added. Examples:
Now with "s" at eh end:
- Raimond's bike is the best.
- Olga's bill is due.
- Vargas' fortune is huge.
- Workers' families are expecting the conference.
Last edited by angelg; 28-Jun-2008 at 02:04. Reason: I'm not a teacher.
The Mother and Toddler's Club
It is one of those cases where the two conflate into a single unit - a "mother-and-toddler".
The same can be seen it "it is John and Mary's house".