4M Kidzlabs Science of Spying Educational Kit. Learn spy techniques and become a super secret agent with this spy kit. Impress your friends and family by learning to communicate in Morse code or decipher top secret codes The science of espionage will no longer hold any secrets for you. This spy kit contains: the necessary materials to create the diary, two filter lenses, a bag, a flashing torch, an invisible ink pen and a developer pen, two capsules and four caps, a double adhesive tape. Box size: 22 x 17 x 6 cm. Age from : 8 years old.