Strictly confidential. This number secret hideout is the safest place in the children's room. Kids aged 8 to 12 can build their own cryptex with this explorer set, which cannot be cracked by anyone else. The colorful instructions guide them step by step on what to consider when setting the 6-digit code and how the individual rings of the cryptex connect with each other. Forgotten the number combination? No worries, there is an emergency key for that. Children will learn about other secret writings and codes, and how secret messages have been encoded and decoded for thousands of years in the information corners of the instructions. Build a secret hideout - set the code - protect messages. Top Secret. Inside this number safe - the so-called cryptex - secrets remain hidden, and only the correct code can unlock them. Kids assemble the secret hideout from individual parts and discover the mechanics behind it. Only they will know the 6-digit code in the end and how to open the cryptex. With the extra coding disc, they can learn additional encryption techniques and secret writings. The colorful instructions clearly show how the individual cryptex rings connect and explain how encryption techniques worked in the past and how they work today. A mysterious experiment set from KOSMOS for detective kids aged 8 and up. Puzzle fun and clever technology in one - perfect for birthdays or just because. Contents: colorful illustrated instructions with exciting background information, building set with 16 parts, emergency key, paper card with number strips, coding disc, 2 secret writing cards, 2 code grids.