To celebrate the 4th July, we have included 3 activities in this week's challenge.

  1. Make your own burger and have a family BBQ (wear red, white and blue).
  2. Americans celebrate with fireworks so make your own firework in a jar.
  3. Fireworks make lots of noise and sometimes it's too hot to allow fireworks on 4th July in case of fires, so take some bubble wrap into the garden and jump up and down on it to make it pop and bang like fireworks.

To make your own firework in a jar:

  1. Fill a jar 3/4 of the way full with warm water.
  2. In a separate bowl, mix 3-4 tablespoons of oil and several drops of different colors of food coloring (I used 4 drops of each color: red, yellow, blue, and green).
  3. Use a fork to gently mix the oil and food coloring together.
  4. Gently pour the oil mixture into the jar.
  5. Watch what happens—the food coloring will slowly sink out of the oil and into the water. When this happens, it will expand and begin to mix with the other colors.

The science behind it:

Food coloring dissolves in water but not in oil. Because the oil is less dense than the water, it will float at the top. The colored droplets will begin to sink because they are heavier than the oil. Once they sink into the water, they will begin dissolving into the water (which looks like a tiny explosion).