My children and I love all the Rebbe Mendel’s books, with their mix of Torah and adventure. We just got the newest one, Figure it Out!, and began reading it with my son. The stories in the book contain parts that are impossible, and the readers are given hints to figure out what couldn’t possibly be true. Some of the problems have to do with Jewish law, others with scientific facts, but they are all fun to solve.
The previous Rebbe Mendel books can be found here: Rebbe Mendel books.