Colourful Dissolving Skittles

What you will need:

  • A plate or container – preferably white
  • Colourful coated sweets (skittles or M&Ms)
  • Warm water


  • Place your skittles or sweets into a heart shape in your container. Try to alternate the colours.
  • Carefully pour the warm water into the container (you only need a little bit). If you trickle it slowly down the edge, the sweets should stay in place.
  • Can you see a lovely coloured heart?

Why does this happen?

Skittles are coated in food colouring and sugar. When skittles are placed in water, the coloured coating dissolves and we see the colour spread through the water.

There are actually two processes happening in this activity. The colour and sugar dissolve (become mixed into a liquid to form a solution) into the water and then diffuse (spread) through the water.

Extension ideas

  • Do you get a bigger diffused area of colour from a larger sweet?
  • Investigate what happens if you use hot and cold water. Do the skittles completely dissolve?
  • Maybe even try vinegar, can you predict how this might be different?


Please send photos of you and your super science experiment into school for our science display!

Bring your printed photos to Miss Alladice or alternatively send them in on a USB stick or you can email them to the school office with your name and class – [email protected]

Leave a Reply

Your email address will not be published. Required fields are marked *