Ying asked me how I know so much. I replied that I didn't know everything, but can find out through reading as well as searching for the information from the web, which Josh asked "from Google Search?"
It was quite funny as children as young as 6 know about Google Search. I promptly assigned them to go home and ask Mum or Dad to help them look up for info on hurricanes and tornadoes. Hmmmm... I wonder how many will come back with the task tomorrow???
Back to our science lesson, I showed them the difference between solid and liquid. Most things such as stones or spoons are solids and will not change shape over time. Compare this with ice cubes (water in solid form) which will melt and change its shape into that of its container.
We next peeled of the balloon, and viola, we have a solid ice in the shape of the balloon. We placed it inside a ziplock bag and leave the ice there for several hours.
Also showed them hot steam arising from hot water - that's water in gas form when it gets very hot.