Calming Kids Bath Bombs With Surprise Inside

Kids will love these Homemade Kids Bath Bombs with a toy secretly hidden inside.

They also have another secret that parents will love too!

Adding in some calming essential oils to your these bath fizzies, will make them the perfect way to help your little ones calm down for the night, when used just before bedtime.

Calming Bath Fizzies for Kids With Surprise Inside

Although I think these are great for bedtime, they really are great anytime, especially if you ever need help calming down an anxious little one.

Although they’re intended to be used in a bath, you could also just fill up a large bucket or sink with warm water and hand over a bath fizzie to your child for some calming water fun.

Kids Bath Bombs Ingredients

1 cup baking soda
¼ cup citric acid

You’ll also need up to 2 tablespoons of water and a bath fizzie mold like this one.

Optional: Add 5 – 10 drops of your favorite calming essential oil like Lavender, Chamomile or Stress Away.

Calming Bath Fizzies for Kids With toy Inside

Bath Bombs With Toys Inside

Before you get started making these bath bombs for kids, you’ll want to make sure that you have everything measured out ahead of time and the bath bomb molds are ready to go.

Also take a minute to double check that your Legos or other toys will fit into the center of the ball.

You may need to bend their legs or adjust their arms a little to get them to fit perfectly.

If your Lego (or other toy) is too large, there may not be quite enough surface space for the two sides to bond together very well.

Choose a toy that will easily fit and be completely covered by the bath bomb ingredients for the best results.

bath fizz balls

DIY Bath Bombs for Kids

Now that you have all of your bath bomb ingredients and tolls ready to go, it’s time to get to work making them.

Thoroughly mix together the citric acid and baking soda in a large bowl.

Very slowly pour in the water and mix with your hands.

You want just enough water to give the baking soda and citric acid mixture a damp, sand-like consistency that will hold together when squeezed.

Calming Bath Fizzies for Kids With Lego toy Inside

Scoop up some of the mixture into one half of the mold-do not pack down, then press your Lego into it, place more of the mixture on top.

Then fill the other half of the mold with all of the rest of the mixture and quickly press the two halves together.

I find that if I use a slight twisting pressure in from both sides it helps lock the two sides together.

Child placing Calming Bath Fizzies in tub.


You should be able to carefully and easily remove the molds from the bath fizzie.

If it is sticking you can use a wood or silicone spoon to gently tap on the molds to try to help loosen them.

Sometimes they stick for no reason and you may need to simply start over.

If your mixture is starting to dry out a bit, you can simply add a *tiny* bit of water to rehydrate.

Too much water will cause them to constantly expand and never hold that classic bath bomb shape.

Toys coming out of bath fizzes


Allow the fizzies to air dry in a sunny place until completely solid. Depending on humidity this may take about 24 to 48 hours.

They’re done when they seem breakable and feel crusty.

bath fizzie with toy inside

When you’re ready to enjoy, simply let your child add it to the water and be surprised by the hidden toy in the center!

bath bomb hidden toy

*These are best for kiddos who are old enough to not put things in their mouth.

Although I talk about using calming essential oils in this particular recipe, you could also choose oils that are known to help with wellness like the ones I use in this Homemade Vapor Shower Disk recipe.

If you like this Homemade DIY Recipe, you’ll love these ones too:

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