DIY Sensory Activity · OT-Approved · Brewer, Maine
A pediatric OT-approved bath bomb recipe for sensory-rich bath time.
Bath time is one of the most regulating parts of a child's day — warm water, deep pressure, predictable rhythm. Adding a homemade bath bomb turns it into a multi-sensory experience that engages tactile, olfactory, and visual input all at once. Here's our OT team's go-to recipe for families wanting to support nervous system regulation at home.
Why bath bombs work as a sensory tool
Bath bombs deliver four types of sensory input simultaneously — which is why kids find them so engaging and why they're particularly useful for children with sensory processing differences:
- Tactile — the fizz on skin gives gentle, predictable tactile input that helps tactile-defensive kids tolerate water
- Olfactory — essential oils provide aromatherapy that supports calm (lavender, chamomile) or alertness (peppermint, citrus)
- Visual — color dispersing through water is mesmerizing and calming for visually-seeking kids
- Proprioceptive — warm water plus the weight of submersion gives deep-pressure input that regulates the autonomic nervous system
Ingredients
- 1 cup baking soda
- 1/2 cup citric acid
- 1/2 cup Epsom salt (great for muscle relaxation)
- 1/2 cup cornstarch (makes bath bombs silky)
- 2 1/2 tablespoons coconut oil (or olive/almond carrier oil)
- 3/4 teaspoon water
- 10–15 drops essential oils — lavender for calm, orange for energy, chamomile for sleep, peppermint for focus
- Food coloring (optional)
- Silicone or bath bomb molds
Step-by-step instructions
Step 1: Mix dry ingredients
In a large mixing bowl, combine the baking soda, citric acid, Epsom salt, and cornstarch. Stir well to ensure all ingredients are evenly distributed.
Step 2: Prepare wet ingredients
In a separate small bowl, mix the melted coconut oil, water, essential oils, and food coloring (if desired). Stir thoroughly.
Step 3: Combine wet and dry mixtures
Slowly add the wet mixture to the dry, whisking continuously. Be careful not to add too much liquid at once — this can cause the citric acid to fizz prematurely. The mixture should feel like damp sand and hold its shape when squeezed.
Step 4: Mold the bath bombs
Quickly pack the mixture into silicone molds. Press firmly. Let them sit for at least 24 hours to harden fully.
Step 5: Unmold and store
Once dry, carefully remove from molds. Store in an airtight container.
OT tips for customizing
- For sensory-seeking kids — add biodegradable glitter for visual sparkle
- For kids who love surprises — hide a small waterproof toy or fidget inside
- For evening regulation — stick to lavender, chamomile, or vanilla scents
- For morning alertness — use peppermint or citrus blends
Other OT-recommended sensory tools
If your child loves the multi-sensory experience of bath bombs, our team often recommends these OT-curated tools for daily nervous system regulation:
- Fidget toys and oral motor tools — tactile and proprioceptive input for daily regulation
- Weighted blankets and compression vests — the deep-pressure equivalent of bath water all day
- BrainMax Sensory Putty — proprioceptive hand input that mimics the squeeze of warm bath water
Want a personalized sensory plan for your child?
Our Brewer clinic builds OT-informed sensory diets families can implement at home in their first week.
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