Tales of magic

1.

Faced with a dull summer in the city, Jane, Mark, Katharine, and Martha suddenly find themselves involved in a series of extraordinary adventures after Jane discovers an ordinary-looking coin that seems to grant wishes.

3.

On a vacation with their mother and stepfather, Jane, Mark, Katharine, and Martha find themselves overwhelmed with a lakeful of magical adventures after Mark captures an ancient turtle that seems to have extraordinary powers.

5.

When the family moves to Connecticut, twins James and Laura make new friends and begin a series of unusual adventures after discovering an old well that seems to be magic in their backyard.

7.

A seven-day book of magic proves to be fractious for five children, who must learn the book's rules and tame its magic.