Note: ketika bagian kanan buku digeser yg menunjukkan angka tahun, maka saat dibuka otomatis halaman yg terilhat/terbuka sesuai dengan kisaran tahun yg ada didepan buku.
A fun new format including a time traveller's dial allows kids to explore some of the greatest inventions in history. This interactive book format invites children to go through different time periods, learning about the invention of the bicycle, the first telephone, the airplane and many more. The cover mechanism enables them to dial into and learn about a specific period in history through colorful and inviting illustrations and facts. This entertaining reference tool is a great resource and addition to a home library.