Their magic tree house takes Annie and Jack to Pompeii just as Vesuvius is about to erupt, and they must find a Roman scroll before everything is covered with burning ash.

Children and their robot friend build a treehouse in a rhyme that fits the tune of "London Bridge is Falling Down." Includes facts about simple machines, jobs robots do, an activity, and musical notation.

Fifth-grader Winnie, with notes from her friends, writes of turning her treehouse into an embassy after her newly-divorced parents become unreasonable, where she is joined by nine others with complaints.

Their magic tree house takes Jack and Annie back to the Wild West, where they experience excitement and danger and try to solve a riddle.

"The magic tree house whisks Jack and Annie away to South America, where they must climb Machu Picchu to save a baby llama."--

"The magic tree house whisks Jack and Annie back in time to meet famed Roman emperor Marcus Aurelius!"--

Pete invites his friends over, but when he finds that his tree house is not big enough for everyone, they work together to build a fun place that can house everyone.

"When the magic tree house returns it whisks Jack and Annie away to the Galapagos Islands where they become World Turtle Experts and must save a tortoise in danger of an erupting volcano"

"The magic tree house whisks Jack and Annie to Africa where they must use magic to save a rhino and her baby from poachers"--Provided by publisher.

Andy and Terry's incredible, ever-expanding treehouse has 13 new stories, including a watermelon-smashing level, a wave machine, a life-size snakes and ladders game (with real ladders and real snakes!), a rocket-powered carrot-launcher, a Ninja Snail Training Academy and a high-tech detective agency with all the latest high-tech detective technology, which is lucky because they have a BIG mystery to solve - where is Mr Big Nose??? Well, what are you...