Ravensburger Science X Secret Codes Activity Kit
How do you crack a secret code? How do you encrypt your own secret messages? With these exciting activities, every budding secret agent will turn into an expert cryptologist. Which method will you choose to accomplish your mission?  Contents: 1 Knot Holder, 1 Packet of String, 2 Brass Fasteners, 2 Decoding Discs, 1 Stick of Wax, 1 Sheet of Paper, 2 Code Templates, 1 Pencil, 1 Mirror, 2 Straws, Detailed Instruction Manual