Dora and Boots encounter a huge book of nursery rhymes and quickly step inside to help a lost lamb find its home in "Dora Had a Little Lamb." Along the way, Dora and Boots recite and sing favorite rhymes like "Hickory Dickory Dock," help put "Humpty Dumpty" back together again after his fall, and discover the reason the "Itsy Bitsy Spider" climbed up the water spout in the first place. Dora and the riddle-loving Boots are headed for Tall Mountain to solve the silliest riddle of all in "Call Me Mr. Riddles," but first the pair must solve the Troll's riddle to cross the bridge and figure out how to open the knock-knock door. Skills stressed in this program include visual discrimination, problem solving, attention to detail, and some Spanish vocabulary.