Take it further:
- place natural materials in the water before freezing or pop in a small toy
- try a few drops of food colouring in the water – what happens to the ice?
- for flatter, round decorations use a saucer
- use clay or similar malleable material to create different shaped moulds
- you could do this activity in the summer by putting your pots on a tray in the freezer – hang them up and see how long they take to melt, or for your object to be released from the ice.