Instructions
There is a myriad of toffee recipes, here’s just one. The experiment is similar to growing salt crystals, except the supersaturated sugar solution is hot, so have an adult handy.
1. Carefully heat the water & vinegar in the saucepan.
2. Add the food colouring and sugar and stir constantly, slowly dissolving the sugar and bringing to the boil. Allow to simmer for 10 minutes - checking in frequently to avoid burning or overflowing.
3. With an adult, carefully pour the mixture into the cupcake papers and place a string in each of the mixtures.
