STEM bath bomb kit: chemistry meets self-care

discover the science behind fizz and relaxation with this hands-on bath bomb kit. students explore basic chemistry concepts like acid–base reactions while learning how natural ingredients come together to create soothing self-care rituals. this interactive activity blends creativity, measurement, and sensory play, giving young makers the chance to craft their own custom bath experience from start to finish.

learning outcomes:
understand how acid–base reactions create fizz
explore natural ingredients that support relaxation and skin softening
practice measurement, mixing, and observation skills
encourage creativity, mindfulness, and hands-on learning

includes: pre-measured baking soda, citric acid, arrowroot, epsom salt, carrier oil, fragrance vial, a reusable 2.4-inch bath bomb mold, a mixing stick, dried herbs (varies by scent), and step-by-step instructions with a science activity card.

scent options

citrus burst with calendula petals
bright, juicy, and sunshine-filled. notes of grapefruit, lemon, and mandarin open the scent, softening into peach and orange with a smooth vanilla-citrus finish. calendula petals add a golden glow and a gentle herbal touch to the bath.

berry burst with rose petals
sweet, juicy, and dessert-soft. black cherry leads into raspberry, strawberry, and plum with creamy vanilla and warm sugar at the base. crushed rose petals add a pop of color and botanical beauty.

white sage & lavender with lavender buds
calming, grounding, and soft. lavender blends with white sage, chamomile, and rosemary, settling into warm sandalwood and cedar. lavender buds bring natural aroma, texture, and a soothing sensory moment.