This top secret science set will help your child to explore and learn about coding, circuitry, secret messaging and much more! It supports National Curriculum learning and is safe, educational and fun! Explore the wonders of Secret Science! Includes 8 amazing top secret activities. Use an optical illusion to build a secret magic photo box; make secret coding bracelets for you and a friend; use mirror messaging and make invisible inks. You can also decipher the secret coded message in a water fizzer; understand circuits and personalise a motion sensor room guard, complete with a recorded message function! Comes with clear instructions about how to conduct the activities at home, as well as the method and science behind what you¿re doing. Please note that some activities require additional household ingredients (not included): 2 x AA batteries, sticky tape, kitchen foil, small torch bulb, lemon juice, baking powder, purple grape juice, tonic water.