Unfortunately with the current Coronavirus pandemic the country has had no choice but to go into lockdown which means the schools have closed. Isa is going to have to be homeschooled until further notice. I enjoyed science when I was at school and I wanted to pass this on to Isa too. We carried out this fun experiment which he really enjoyed. It’s so easy and quick and the perfect illustration of how certain chemicals react with each other.
Makes 2 cupcakes or 1 moon cake
Prep 30 mins, plus 2-4 hrs setting
- 100g bicarbonate of soda
- 50g citric acid
- 25g cornflour
- 25g Epsom salt (optional)
- 2 tbsp oil – such as sunflower, coconut or olive oil
- ¼ tsp essential oil, such as orange, lavender or chamomile
- a few drops of liquid food colouring
- orange peel, lavender or rose petals, to decorate (optional)
You will also need
- mixing bowl
- plastic moulds (see below for ideas)
1. Put the bicarbonate of soda, citric acid, cornflour and Epsom salt into a bowl. Whisk until all the ingredients are combined.
2. Pour the base oil, essential oil and food colouring in a small bowl. Mix together well, combining the oil with the colouring as much as possible.
3. Very slowly add the oil mixture into the dry ingredients a little at a time, whisking between each addition. When all the oil is added, add a few tiny drops of water and whisk again (it will fizz when you add the water, so mix it in quickly). You’re looking for the mixture to slightly clump together when pressed in your hand and keep its shape – it shouldn’t be too wet.
4. If you’re adding peel or flower petals to decorate, drop them into the bottom of your chosen mould. Pack your mixture tightly on top, pressing down and smoothing out the top with a teaspoon.
5. Leave your bath bomb in the mould to dry for 2-4 hrs, then carefully remove it. It’s now ready to drop into the bath – watch it fizz away!
What can I use as a bath bomb mould?
You can use anything flexible as a mould for your bath bombs, so have fun looking around your home for things you could use. Here are some ideas to get you started:
- Yogurt or pudding pots
- Plastic packaging from toys
- Easter egg packaging
- Silicone ice cube trays
- Silicone cupcake cases
- Plastic biscuit cutters (place them on a tray)
We used a standard metal cupcake tin and moon cake moulds.