Reviewed by ADF (age 10)
They had to do many tasks like defeating a horde of dragons to get to the Water of Memory and Imagination that would break the spell. After they were done with all their tasks and got the water, they returned to the castle and the spell was broken! When they got home they couldn't remember anything.
I would recommend this book to anyone who likes fantasy books. I really liked the part about defeating the dragons. I think the author should make more books like this one. I like books written by Mary Pope Osborne as she does a great job keeping your interest while you read.