Collaborating with Oyako Smile. Mix for fluffy foam, roll for a bath bomb?! Introducing the educational bath accessory "Neruneruneru Bath Bomb"

NOL CORPORATION (Headquarters: Chofu, Tokyo) will release "Manaburo Neruneruneru Bath Bomb," a collaborative bath accessory with Oyako Smile LLC (Headquarters: Osaka, Osaka), a venture startup from Rohto Pharmaceutical Co., Ltd., on Friday, March 27, 2026. You can mix two types of powder to create foam or roll and harden it to make a bath bomb.

We propose this product to expand bath time into an experience of "learning while playing," creating opportunities for parent-child communication.

"Bath x Learning" in everyday life through collaboration with Oyako Smile

This product was realized through a collaboration between Oyako Smile's desire to increase "opportunities for communication through science play" in daily life spent with parents and children, and our "Manaburo" line of educational bath accessories that allow children to learn while playing.

Incorporating the insights into parent-child communication cultivated by Oyako Smile, it is designed to draw out a child's "Why?" and "I want to try it!" We propose it as a bath accessory where observation and conversation naturally expand in the relaxed environment of a bath, connecting experiences directly to learning. We have also devised ways to interact and enjoy the product at home from a uniquely collaborative perspective. Make daily bathing a slightly more special time.

Mix for foam play, shape into a bath bomb

Neruneruneru Bath Bomb is a bath accessory where you mix "Powder No. 1" and "Powder No. 2" using the included special spoon.

You can enjoy two types of play by putting the powder into a washbasin and adjusting the amount of water. If you add the specified amount of water, mix, and shape it, it becomes a "bath bomb," and if you add more water, it becomes "fluffy foam" that you can enjoy.

Finally, put it into the bathtub to dissolve it, and enjoy your bath time while watching it fizz.

Stimulate intellectual curiosity with a miniBook

The included miniBook contains tips on how to make it, as well as hints to connect the experience to time spent "learning while playing." By seeing, touching, and enjoying changes such as the foam expanding, clumping, and hardening, it naturally draws out your child's intellectual curiosity, leading them to ask, "Why does this happen?" or "What should I do next?"

For example, it includes hints that expand conversation between parents and children, such as "Why does it bubble?" or "Why does it feel cool?"

From putting into words what you noticed while playing, to dissolving the finished bath bomb in the tub and comparing how it fizzes, learning naturally accumulates step by step. Please enjoy the experience of "learning while playing" together as a parent and child.

Product Information

Neruneruneru Bath Bomb

440 yen (tax included)

Content: Powder No. 1 (25g, 1 use), Powder No. 2 (50g, 1 use)

Scent: Unscented (Blue), Floral Scent (Pink)

Release Information

Release Date: Sequentially from Friday, March 27, 2026

Availability: Nationwide variety shops, general stores, drugstores, etc. (excluding some stores)

About Manaburo

A bath additive brand with the concept of "educational play in the bath, fun parent-child communication."

It was born from the desire for parents and children to bathe together, learn, and have plenty of communication.

For children who love baths, and those who don't.

Make every day's bath time a little more special.

It is a series of bath additives packed with fun gimmicks that stimulate intellectual curiosity and lead to surprising new discoveries.

About Oyako Smile LLC

As a venture startup from Rohto Pharmaceutical Co., Ltd., Oyako Smile LLC is engaged in creating services and products that accompany the daily lives of parents and children.
Centering on fun science experiences at home, they turn ideas that support parent-child communication and a sense of "I did it!" into reality. For this product, they leveraged their expertise in "learning design" that parents and children can enjoy together to realize this joint development.

Oyako Smile LLC Website: https://oyakosmile.com/