Celebrate the special bond between grandmas and grandkids with this delightful New York Times bestseller that puts the kids in charge of babysitting...if just for one day. The perfect gift for Mother's Day, Grandparent's Day, and any day shared with Grandma! 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 books comes a funny and heartwarming celebration of grandmas and grandchildren. The fun doesn't stop! Check out more HOW TO... picture books: How to Babysit a Grandpa How to Catch a Santa How to Get Your Teacher Ready How to Raise a Mom How to Surprise a Dad