I work in a nursery with pre-school children and this week our topic is science.
I did an experiment called 'Ocean waves' where you fill a jam jar half with water and half with cooking oil.Then you add a few drops of blue food colouring.( held on its side it makes waves like the ocean)
I then put the lid on and gave it a shake and said to this little girl,"watch & you'll see it separating in a minute"
I gave her the jar and she held it up and got all excited and said,"look,it's celebrating"