Here’s a simple and fun science activity for firework night coming up this week! . You will need: . •A jar filled with water •Oil •Food colouring . 1.Pour some oil in a shallow container 2. Add some drops of different colour food colouring. 3. Use a cocktail stick or fork to break up the drops of food colouring a little. 4. Pour the mixture into the water and watch the fireworks go! . The science: The oil floats on top of the water because it is less dense. The food colouring doesn’t dissolve in