I could not find cover art in Amazon for this book, so I have attached another book in the Alistair series (Alistair and the Alien Invasion). All of them are great, and I would suggest you first try out Alistair's Time Machine. Alistair constructs a time machine for the science fair, and he travels throughout history. The machine does not work at the science fair, and a dejected Alistair wonders how he can prove to adults that it works. Meanwhile, a bunch of woolly mammoths linger outside his school. This is a very amusing and enjoyable story that any kid will love.