This is great with Junior Infants as it is so relatable and simple, yet they are using scientific language and methods. As well as melting ice, I have also used chocolate and then discussed how ice and chocolate melt by applying heat but then can return to a solid shape after too. I have toasted bread to show how some materials can change – by adding heat ( as with the chocolate/ water) but some can’t return to their original state – ie. bread once it is toasted it can’t return to bread. Again, a relatable material for young children.