Here is a really fun way of experimenting with water and boats. Make a boat out of tin foil and see how many items you can fit in before it sinks. Make different shaped boats and see what happens. How many 1p coins can you fit into a boat before it sinks? Can you predict how many?
It is so easy and simple and can be done in the bathroom sink! Have fun exploring. To extend the challenge, record your findings and compare them. Don’t forget you can predict the outcome and estimate the number of items too.