This is a fun activity that is easy to set up.
All you need is
Watered down paint and a brush
Or wax crayons
The boys looked on confused while I drew invisible pictures with the candle.
Then they Wowed and gasped in amazement as they watched the paint reveal the secrets underneath.
They had great fun drawing their own secret pictures.
Older children can practice being spies writing secret codes and messages.
You could also play guess what i drew.