What makes things glow?

Materials:

Highlighter

½ cup of water in a clear cup

Purple & blue cellophane

Scissors

Torch

Tape

Blue and purple sharpie

Method:

1. Dissolve highlighter ink in ½ cup of water and leave to absorb
2. Cover the torch with purple cellophane then blue (first form of light)
3. Cover torch with tape and colour with blue sharpie, tape again then blue again,
4. 
   
   1. tape then colour using purple sharpie (2nd form of light)
   2. Go to dark room and shine the light on the cup of coloured water