Write a secret message on the yellow paper ... When the ammonia evaporates into the air, the original yellow-gold color returns. This activity is adapted from an activity that originally appeared in ...

you and your child can learn how to make a cipher wheel together and use it to send secret messages to one another. This activity involves cutting out templates, so please supervise your child and ...

The programme explores how to animate and programme digital pets, create secret messages to share with ... print out the student activity sheets and download the hex files for the activities ...