How to make Fun Bath Bombs

How to make Fun Bath Bombs

Bath bombs are fun to make and create a fizzing good bath time!



This would make a great activity at a Science Lab Party!

What you Need:

  • Measuring jugs/bowls
  • Tablespoons
  • stirring spoons
  • silicon moulds (cupcake moulds come in all shapes and sizes – we like these star shaped ones – although some did break when we took them out of the moulds!)
  • Spray bottle/s filled with water.
  • gloves (citric acid or lemon juice will sting if they have cuts on their hands or rub their eyes.)



  • Citric Acid (or equal parts lemon juice and water shaken well in a spray bottle)
  • Bicarbonate of Soda (you’ll need a lot of this!)
  • Epsom salts (optional)
  • Essential Oil/s (lavender works well but you can use anything you like)
  • A pinch dried flower petals (optional)
  • Food colouring (optional)


Making Individual Bath Bombs:

For kids who can manage on their own and want to make a more personalised bomb and choose their own scent or colour.

What to Do:

  • Get the kids to make labels for their bombs while you are getting everything ready
  • Give them each a bowl
  • Add 1 tablespoons of Bicarbonate of Soda to their bowl


  • Add 1 tablespoon of epsom salts (optional)
  • Add 3 heaped teaspoons of Citric Acid (or leave out and use lemon water for spritzing)
  • Stir well


  • Add a pinch of the petals if using and stir
  • Add a couple of drops of essential oil and stir


  • Add a few drops of food colouring (optional)
  • Start spritzing your mixture with the water spray bottle and stirring at the same time – it will start to fizz where it gets wet


  • This is the tricky part – knowing when to stop spraying water and when the consistency is right. When the mixture is getting harder to stir, test it by making a mould out of your spoon and seeing if it holds its shape and is smooth. If it compacts well then it is perfect – too soggy and it will be fizzing and expanding in the mould and won’t keep it’s shape. If it all goes wrong just start again or add more bicarbonate of soda and citric acid!


  • When it is like sand then spoon it into the mould and press it down firmly and smooth the top. You want it well compacted for a great fizzing bomb.


  • Write the kids names on some paper and place their bomb next to their name so they don’t get mixed up. Leave for 30 mins then they should come easily out of the mould. Get the kids to wrap their bomb in tissue paper, tie with a ribbon and stick their label on. That’s the party gift sorted!

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Making One Batch of Bath Bombs:

You might find it easier and less messy to make one big batch. Do exactly as above with the following changes (for about 12 bath bombs):

  • Use 1 large measuring jug or bowl
  • Change the amount to 12 tablespoons of Bicarbonate of Soda to the jug or bowl (all the kids can have a go at this.)
  • Change the amount to 4 tablespoons of Citric Acid
  • Add a few more pinches of petals
  • Change amount to 12 drops of essential oil
  • Use 1 spray bottle to spritz your mixture (remember to keep stirring). The kids will enjoy this so let them have a go but make sure you keep checking the consistency.
  • When the consistency is perfect (like wet sand) the kids can spoon it into their moulds and smooth down the top.
  • Finish off the bath bombs with tissue and ribbon as above.

You will never see kids more keen to get in the bath!


Where to find what you need if you don’t have it at home:

Mini spray bottles

Spray bottle

Silicon cupcake moulds

Disposable gloves

Citric Acid

Dried Flowers 

Epsom salts

Other Ideas for even more fun


Galaxy Bath Bombs:

Why not try galaxy bath bombs by dividing the mixture into 3 and then adding different colours to each and re-combining for a multicoloured galactic bomb! Take a look at Bustle’s blog on How to make a Galaxy Bath Bomb

Bath Bomb Surprise:

Hide little toys inside like mini plastic dinosaurs or charms for a fun surprise when the bomb fizzles away! Try this tutorial from Soap Queen

Glitter Bombs:

Try adding glitter for a sparkly bath! You could use some old make-up if you have glittery eyeshadow lying around or get some body glitter – we wouldn’t recommend craft glitter as it is not intended for body use. Also be aware you might end up with some very sparkly children after bath time!




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