Foaming Fizzy Potion

The children in Primary 5 are studying George’s Marvellous Medicine by Ronald Dahl.  They read that when George made his magic medicine, it frothed and foamed and fizzed.  The boys and girls re-created their own foaming fizzy potion using bicarbonate of soda, washing-up liquid and lemon juice.  The bicarbonate of soda when mixed with lemon juice forms a carbon dioxide gas creating bubbles.  It reacts with the washing-up liquid to create more bubbles.  We added food colouring for fun.  The children loved this science experiment.