I saw this post over at Modern Parents Messy Kids and thought these Magic Milk Paints would be a great idea for our fireworks week. It's a little bit of science, a little bit of art... you add food colouring to a bowl of milk, then swirl it about with cocktail sticks dipped in washing up liquid. The fat in the milk reacts with the soap and creates a beautiful explosion effect.
I think the dish I used was too deep because the colours seemed to drop straight to the bottom, but we did get a few little explosions. You should def check out Steph's post to see how great it looks when it works!