First, they made ‘magic water’ and discussed the word ‘insoluble’ meaning unable to dissolve.

Then, they made ‘rainbow milk’ and discovered that dish soap causes milk to separate due to the fat and proteins in it. Adding food colouring creates a rainbow pattern, due to the movement which is created between the two fluids.

Next, they made lava lamp monsters. They noticed that the oil and water would not combine due to the different densities (oil is lighter than water). Add a catalyst (effervescent tablet) and this creates carbon dioxide gas which pushes through oil and escapes into the air - causing bubbles to rise and fall.

Finally, they made ‘elephant toothpaste’. They had to take this outside, as they needed to use hydrogen peroxide for this investigation. Yeast is used as a catalyst to speed up the process, and this, when mixed with soapy water creates a foam like substance (which looks like toothpaste big enough for an elephant!).