You know that phase where kids throw random stuff in a bowl and call it a potion? This is that, but with bubbles, eyeballs and less regret.
This witches brew soap foam is thick, scoopable and glows in the dark. It ends up on your sleeves no matter what, but the “I made magic!” faces are worth it.
How to Make Witches Brew Soap Foam
Witch’s Brew Fizzing Science Experiment
Get the printable½ cup tear-free kid soap or bubble bath
1 cup warm water
1 to 2 teaspoons glow in the dark green mica powder
Hand mixer or immersion blender
Large sensory bin
Plastic spiders, eyeballs, bones, scoops and mini cauldrons
Add the ingredients
Put the soap, warm water and 1 teaspoon of mica powder in a large bowl.
Stir
Stir until the color shows. Add a little more mica for a brighter green.
Whip it
Beat with a hand mixer until thick, fluffy foam forms.
Add creepy mix-ins
Scoop the foam into the bin and add spiders, eyeballs and bones.
Play
Scoop, stir and brew!
Safety note
Soap foam isn’t for mouths or eyes. Use tear-free soap, supervise closely and rinse hands after play. Keep the mixer out of kids’ reach.
Tips for the Perfect Glow
- Use warm water so the mica mixes in instead of floating.
- Start with 1 teaspoon and add more only if you need it.
- Charge it near a lamp or window for a few minutes, then turn off the lights or use a blacklight.
- Foam fades after a while. Whip up a fresh batch as needed.
More Halloween sensory play
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Stir up a paper potion too with our cauldron cut and paste craft.
The experiment includes
- Witch’s brew fizzing experiment directions
- Recording pages
- Instant PDF download, nothing is shipped
Perfect for
- Halloween science
- Preschool through 2nd grade
- Classroom parties
Soap Foam Sensory Bin FAQ
Whip 1 part kid soap with 2 parts warm water using a hand mixer until thick foam forms.
Mix in glow in the dark mica powder, charge it in light and turn off the lights.
With tear-free soap and close supervision, yes. Keep it out of mouths and eyes.
It holds up for a while, then slowly deflates. Re-whip or make more.
More Halloween Sensory Play
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From families like yours
Did you try it? Tell us how it went!
We love seeing these activities out in the wild: the lumpy letters, the snack breaks, the proud “I made a B!” moments. Leave a star rating, tell other parents what worked (and what totally didn’t), and add a photo of your setup if you’d like.
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