Little Miss C is still very much in love with her science kit and we get regular requests to do "speriments" with her, or she'll look through the experiment cards and decide which one she wants to do next. Easter Sunday was very much the same and she pulled on one particular card where the experiment was to look at the fact that oil and water do not mix and that water is also more dense than oil, meaning that the oil will float on the surface of the water.
A bit of blue food colouring in the water made the difference between the two liquids a bit more obvious and she had great fun shaking the test tube (with a lid on I'm pleased to say) and then watching how they still always ended up the same way round. We extended things by looking at which objects will float and which sink and had a good discussion about the relative "heaviness" of different things from rice and pasta to a small screw.
Once she started to ask more questions we brought out our copy of Mini Scientist In the Kitchen and added some golden syrup the test tube too. Syrup being more dense than water this sank to the bottom and no amount of shaking was going to make it budge. Again things were added to the tube to see if they floated or sank.
It being Easter we then moved on to eggs and whether they sink or float in water. After seeing that they sink the addition of salt makes the water more dense and therefore an egg will then float. Adding pure water to a glass half filled with salt water will dilute it enough that the egg will then move down and sink again.
She's decided that she wants to try making a bridge for carrots and a spaghetti and marshmallow structure next. I guess I'll be adding marshmallows to the shopping list!