With the help of his super-smart pocket robot, Thudd, Andrew builds an amazing shrinking machine. When it accidentally shrinks them, they find themselves outside a cave of sticky goo. Where are they? They're on the nose of a dog!
Really like this book and plan to search for the rest in the series. We homeschool so there were some really great jumping off points for a week or more of science lessons. And my highly distracted boy is very interested and helping to search for the next book.