The children put thier DNA in a tiny bottle to look at.
The children swished their mouth with some salt water and spat it into a cup.
Then fill a test tube with half the saline and spit, then put in squeeze of pineapple juice, (a carton one will do), then a squeeze of dishwasher liquid, and squeeze neat alcohol then gently tip and mix.
The DNA floats to the top so using a glass rod wrap around and fish out , we put it in a cute little fairy bottle filled with fresh saline solution and look at their floating DNA !!!