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A set of oral hygiene products designed for children from 4 to 9 years old to cultivate healthy oral habits with a playful experience.


Table of Content

Olina zhang

Product Designer

Shuxian Hong

Industrial Designer

Yi Ding

Product & Packaging Designer

Table of Content

  • Oral Hygiene Market Trends

  • Current Issues Discovery

  • Product Study

  • Design For Children

  • Children's Dental Problems

  • Healthy Oral Hygiene Habits

  • Persona Profile

  • Design Goals

  • Pack Out Analysis

  • Life Cycle Assessment

  • Okala BOM Analysis

  • Sustainable Minds Analysis

  • Study Insights

  • Product Set Overview

  • Branding Language

  • Design Details

  • System Diagram

Background Research

Background Research

Market Trend


Oral Care Market Size Projection

$ 58.9 Billion by 2027

Oral care has boomed due to Covid-19 and increased interest in elevated hygiene and aesthetic practices.

Current Issues

Environmental Pollution

2 billion plastic toothbrushes end up in landfills and oceans every year.

Dental Problems

Nearly 100% of adults have had at least one cavity.

User Research

Children From 4 to 9 Years Old

User Research

Why Design for Children

Establish healthy routines right from the start

Gain lifetime benefit for high-quality life

raise environmental consciousness from an early age

Children's Main Dental Problems


of 5-year-olds in 2019 have had dental decay.


children 2 to 11 have had dental caries in their primary teeth.


of children 2 to 11 have untreated dental caries.


of children 6 to 11 have had dental caries in their permanent teeth

Healthy Oral Hygiene Habits

How to Brush Correctly

Brushing 2 times / day

Brushing 2 min. / time

Floss every time after meal

45-degree at the end of teeth

2 to 3 teeth as a group - Brush vertically

Brush inside of teeth in the same way

Brush occlusal surface

 Divide into 6 areas, brush all of them

Target Ages

4 - 5


8 - 9

Start teaching your child to brush his or her own teeth

Switch to adult toothpastes, introduce flossing into regimen

Unsupervised brushing/flossing, regular dental check-ups.

Persona Profile


Energetic, athletic, sweet tooth

Age: 8 years old
Hometown: Los Angles, CA
Family Relationship: Living with parents and a brother
Snack Preferences: fruits (especially bananas and mangos), chocolates, ice creams, etc
Eating Habits: 3 meals every day; fruits and chips for snack; milk before going to bed

Pain points

bad habits, bad teeth

bored with regular brushing

bored with regular brushing


develop the awareness of healthy oral hygiene habits

have fun brushing experience

guide children to perform oral hygiene properly

Design Goals

Based on previous research & analysis


Help children develop healthy oral hygiene habits.


Create an enriched and engaging brushing experience.


Guide children to perform oral hygiene properly.


Raise environmental awareness from young.

Impact Study

Research for reducing environmental impact

Impact Study

Pack out Analysis

In the beginning, we choose ——

Waterpik Completecare Sonic 9.0

as our object of impact study

What we learned

  • Most of the components are made out of PP plastic.

  • There are 23 different types of materials used in this product set.

  • Most parts are not designed to take apart easily.

Life Cycle Assessment

Okala BOM Analysis

Sustainable Minds Analysis