Reviewed by GregoryS (age 8)
I like the way Len Mlodinow used the outdoor toilet for the time machine. It was a clever idea. I liked reading about the Titanic. It reminded me of when I went to the Titanic exhibit in Philadelphia. Len Mlodinow put math in the story, too. The math helped the kids and other people throughout their journey.
I recommend this book for kids age 8 and down to age 5. I think anyone who likes reading about the Titanic or time travel will also like this story. It is a great adventure story.