What? Why? How?
Children need to e challenged not spoon-fed with facts!
They need to question. To predict. To investigate. This is the first of a series of challenges for children. They are suitable for children from about four years upwards. Children learn by ‘doing’ and all the challenges are simple enough for them to perform themselves with adult supervision.
This first challenge is all about floating and density.
The first video shows the challenge.
The second video repeats the investigation and then answers the questions.
My suggestion is that you watch the first video then perform the challenge asking the questions
Later the second video giving the solutions can be watched.