From the publisher:
It's Grandma's birthday, and both Max and his bossy sister Ruby are making her a cake. Ruby's cake will be a magnificent angel raspberry-fluff creation -- if Max will stop knocking the ingredients off the table. Max's cake will be chock-full of earthworms and Red-Hot Marshmallow Squirters -- if only Max can make the grocer understand his shopping list. Will Ruby get Max out from under her feet? And will Max get his Marshmallow Squirters? Find out in the most endearing Max and Ruby adventure yet!