Today we made Magic Lava, the ingredients were Red cabbage juice powder, citric acid, baking soda, vegetable oil and water. They children noticed that the oil floats on top of the water, I tould them that reason why that happens is because the water is more dense than the oil. Also when we added the citric acid powder it sank to the bottom because it's more dense than both ol and water. When the baking soda joined the citric acid in the bottom it caused a bubbling chemical reaction. The children also noticed that when we first started with the red cabbage it was red and when we added it to the solution it turned blue. It became a color changing bubbling potion.