When you babysit a grandma, if you're lucky, you'll have a sleepover at her house! And with the useful tips found in this book, you're guaranteed to become an expert grandma-sitter in no time. (Be sure to check out the sections on: How to keep a grandma busy; Things to do at the park; Possible places to sleep, and what to do once you're both tucked in for the night.) From the author-illustrator team behind the New York Times bestselling HOW TO... books comes a funny and heartwarming celebration of grandmas and grandchildren.