Inflatables in Snack to the Future (the Inflatables #5)

"It's Lynn's birthday! Except... Lynn hates birthdays. Donut is determined to change her mind by baking the best cake in the whole chewniverse! But when his secret recipe accidentally sends the inflata-gang TIME TRAVELING, they have to face some truly ferocious foes. Can Donut get his inflata-pals home and turn Lynn from party pooper to party popper?"--Provided by publisher.