In the third book of the popular Nut Family series, keep rock and rollin' with singer-songwriter Eric Litwin -- author of the first three mega-bestselling Pete the Cat books -- as he invites readers to chime in and join the nutty, pun-filled fun, with a downloadable song available! Hazel Nut and Wally Nut's playtime roll down a muddy hill turns into a hilarious chase when they get covered in so much muck that they get bigger... and bigger.....