Fizzy bath bombs as a St. Nicholas surprise for children
Are you looking for an original St. Nicholas gift that won’t just be another sweet in the boot? Try cheerful fizzy bath bombs that will light up the children’s bathroom with colourful foam, bubbles and a gentle Christmas scent. The recipe is designed to be gentle on the skin, easy to press and ideal even for beginners – you only need the basic bath bomb ingredients and a bit of creativity.
In the article you will find a recipe recalculated into percentages, an explanation of each component and a detailed procedure on how to press the bath bombs correctly so that they do not dust and fizz beautifully. You just need to wrap them in cellophane, add a name tag and the St. Nicholas gift package for children is ready.
Why to try them with your children
- Rich foam in the tub
SLSA is a mild solid surfactant — on contact with water it gives the bath extra lather.
- Pearlescent effect
MICA powder colourant gives the bath bombs a subtle pearlescent shimmer and playful colours.
- A formula you can rescale
The formula is in percentages, so you can recalculate it for any mould and any weight of mixture.
- They can be made ahead
Stored in a dry place at a stable temperature, the bath bombs keep their fizz for months.
Ingredients – basic recipe (100 %)
This recipe is recalculated to 100 % so that you can easily convert it for any mould (e.g. 100 g, 500 g or 1 kg of total mixture). For children, smaller moulds are ideal – for example half-spheres, stars or hearts.
| Ingredient | Content in % |
|---|---|
| Phase A – powder base | |
| Baking soda (sodium bicarbonate), cosmetic grade | 61.80 |
| Corn starch | 3.00 |
| Epsom salt (magnesium sulfate) | 2.00 |
| Sodium Lauryl Sulfoacetate (SLSA) | 0.50 |
| MICA, powder colourant | 0.10 |
| Phase B – liquid phase | |
| Witch hazel hydrosol (flower water) | 1.50 |
| Grapeseed oil, refined (or another carrier oil) | 1.50 |
| Fragrance oil, Christmas scent of your choice | 0.30 |
| Phase C – acidic component | |
| Citric acid, anhydrous | 29.30 |
The recipe is suitable as a base for fizzy bath bombs for children.
Why each ingredient is there
Baking soda (sodium bicarbonate) forms the alkaline base of the bath bomb. It reacts with citric acid and releases CO2 bubbles that provide the typical fizzing in the tub. At the same time it softens the water and contributes to a more pleasant skin feel.
Citric acid, anhydrous is the acidic component in the fizzing pair with baking soda. The anhydrous form is more stable and less prone to premature reaction with moisture. In bath bombs it ensures intense fizzing and a gentle “spa” effect.
Corn starch refines the texture of the mixture, makes it silky to the touch and helps during pressing so that the bombs do not break. In the bath it gives the water a gentle “milky” effect and leaves the skin smoother.
Epsom salt (magnesium sulfate) gives the recipe a wellness touch. In the bath it contributes to pleasant muscle relaxation and enhances the overall relaxing feeling, which both children and parents will appreciate after a long winter’s day.
SLSA is a mild solid surfactant that creates extra lather on contact with water. Thanks to it, the bath bombs have richer foam and the bath resembles a small foam carnival – ideal for St. Nicholas splashing in the tub.
Witch hazel hydrosol provides a very gentle water phase that helps to bind the mixture. It also brings the soothing properties of witch hazel without making the formulation too wet.
Grapeseed oil is a light vegetable oil that softens the skin and helps the mixture bind during pressing. The refined version has minimal odour and does not overpower the chosen fragrance oil.
Fragrance oil – Christmas scent creates the St. Nicholas atmosphere. “Scent of Christmas”, gingerbread notes or sweet dessert fragrances work great – just follow the recommended dosage and dermal limits of the specific fragrance.
MICA powder colourant gives the bath bombs a subtle pearlescent effect and playful colours. It is ideal for decorating fizzy balls, stars or hearts so that they look truly special in the St. Nicholas gift package.
If you want to know more about ingredients for bath bombs, also take a look at the overview of the category Fizzy bath bombs – ingredients and tools.
Procedure – so that the bath bombs hold their shape and fizz beautifully
Safety when working with powders: When working with fine powder ingredients (especially SLSA, citric acid, mica) we recommend using gloves. When weighing out SLSA, also put on a respirator — it is a very fine powder.
- Preparation of the workspace
Work in a dry environment, ideally at room temperature. Prepare protective gloves and moulds for the bath bombs. All containers and tools must be clean and dry.
- Mixing the powders except citric acid
Weigh baking soda, corn starch, Epsom salt, SLSA and MICA powder into a larger bowl. Mix thoroughly (ideally sift through a sieve) so that the mixture is homogeneous and lump-free. At this stage, do not add citric acid yet, to minimise the risk of premature reaction.
Phase A - Incorporating the liquids
In a separate container, mix witch hazel hydrosol, grapeseed oil and fragrance oil. Add the liquid phase to the powder phase drop by drop or as a fine mist (e.g. using a spray bottle), while stirring constantly. The mixture should resemble damp sand – when squeezed in the palm it holds its shape, but it is still crumbly.
Phase B - Adding citric acid
When the liquids are evenly dispersed, add the citric acid at the end. Again, mix thoroughly so that it is evenly distributed throughout the mass. Work quickly and do not over-wet the mixture, so that the bath bombs do not start reacting already in the bowl.
Phase C - Pressing into moulds
Press the finished mixture firmly into the moulds – the firmer the compression, the more stable the bomb. For spherical moulds, slightly overfill both halves, press them together firmly and, after a few seconds, gently release from the mould. For children’s shapes (stars, hearts) make sure to press the mixture carefully into all the details.
- Drying and storage
Leave the bath bombs to dry for at least 24 hours in a dry, well-ventilated place out of direct sunlight. You can then wrap them in cellophane or paper bags. Store them in a dry place and at a stable temperature – humidity in the air can trigger an unwanted reaction even before the bath.
Result
The result is firm, well-pressed and intensely fizzing bath bombs that, when dropped into water, release bubbles, fine foam, the pearlescent effect of the MICA colourant and a St. Nicholas scent. Children will enjoy the bath as a game, while parents will appreciate a composition based on proven raw materials from the Handymade.sk range.
You can also find Handymade on Instagram – @handymade.sk.
FAQ – Frequently asked questions
How long do fizzy bath bombs last?
If stored correctly in a dry place and at a stable temperature, bath bombs usually last for 6 to 12 months. Over time the scent may weaken slightly, but as long as they have not come into contact with moisture and have not degraded, they should still fizz well.
Is this recipe suitable for children?
The recipe is designed to be gentle on the skin, but it always depends on the chosen fragrance and the individual sensitivity of the child. For very sensitive skin we recommend using more neutral fragrances, first testing a hand bath and ensuring that children do not drink the water and do not dismantle the bath bomb directly in their mouths.
Can I omit or replace SLSA?
Yes, you can omit SLSA – the bath bombs will be less foaming, but they will still react thanks to baking soda and citric acid. For any replacement, use a mild surfactant intended for cosmetics and follow the manufacturer’s recommended dosage. When working with SLSA, always use a respirator, as it is a very fine powder.
Why do my bath bombs crumble or expand out of the mould?
The most common reason is an incorrect moisture level of the mixture. If the bath bombs crumble, the mixture was probably too dry (very carefully add a few drops of hydrosol or oil). If they expand out of the mould or “grow”, the mixture was over-wetted or reacted with humidity in the air – next time, add the liquids more slowly and mix for longer.
Can I use a different fragrance instead of a Christmas one?
Of course. You can choose fruity, floral or sweet fragrances from the fragrance oils category. For bath bombs intended for children, choose milder and not overly heavy perfume compositions and always follow the recommended maximum dosage for the given fragrance oil.
How can I achieve more intense colours of the bath bombs?
When using MICA powders you can split the base mixture into several parts and colour each in a different shade. The amount of MICA is usually very small – start with the recommended amount and add colour gradually. You can find more inspiration in the MICA/MIKA powder colourants category.
You will find all the ingredients for fizzy bath bombs — from baking soda through MICA colourants to Christmas fragrances — in our e-shop.
