PLAY ACTION™ TOOTH BRUSH

Make Tooth Brushing Fun!

Patented Light-up Tech with Sound Unlocks Daily Adventures for Your Child!

Brand: Firefly
Launch: 2022

“Make brushing fun for 2 minutes!”

Unlock interactive adventures for your child with this power toothbrush featuring light-up technology! Experience high-quality sound and music through the built-in waterproof speaker, while receiving real-time encouragement from Sonic the Hedgehog.

Sonic the Hedgehog-themed electric toothbrush with Sonic the Hedgehog character and rings from the game surrounding it

INSIGHT

Person holding a Samsung smartphone displaying a cartoon toilet with a face and toothbrush in a bathroom setting.

"Interactive toothbrushing apps and devices have sparked greater interest in brushing among children, leading to longer and more consistent brushing sessions."

A black smartphone being cooled with ice and water splash on it.

Although Apps can be effective, some parents do not want to spend time setting up their smartphones in the bathroom and worrying about their kids may drop and damage their phones. ”

Colorful scene featuring characters from Sonic the Hedgehog video game series. Central figure is Sonic, a blue hedgehog, running with a determined expression. Surrounding him are other characters including Tails, Amy, and Knuckles, all animated and playful. The background includes balloons and a vibrant, cartoon-style landscape.

"Both parents and children are drawn to toothbrushes with interesting shapes, vibrant colors, and familiar cartoon characters that they feel emotionally connected to."

PROCESS

The project started in a fuzzy front end phase focused on a core behavioral challenge—helping kids brush their teeth consistently and effectively, which is a well-known but poorly solved problem space.

We began by conducting parent and child interviews, behavioral observations, and benchmarking existing solutions to understand why current products fail in real use. The main issues weren’t just physical design—they were low engagement, short brushing duration, and lack of feedback loops that sustain behavior.

From this research, we synthesized key behavioral drivers around play, reward, and interaction feedback. Rather than moving directly into ideation, we used these insights to define clear design principles that guided the direction of the concepts.

We then translated those principles into a structured concept development process, working through multiple directions and narrowing them using user feedback and feasibility constraints.

The outcome was a toothbrush system that combines oral care with interactive behavioral reinforcement, designed not just as a product, but as a tool to improve brushing habits through engagement and feedback.

Diagram titled 'Design Thinking Process' illustrating the stages from research to product solution, with sections labeled 'Fuzzy Front End,' 'A difficult to Solve Problem,' and process steps like discover, define, develop, deliver, including activities such as researching, brainstorming, and prototyping, through a journey from abstract questions to final solutions.
Hand-drawn sketches and notes about electric toothbrushes, including different models, features, and usage instructions; a woman using an electric toothbrush and illustrations of toothbrush components and accessories.

DEVELOPMENT

A detailed analysis of user research and problem understanding, depicted through multiple interview summaries with photos, notes, and sticky notes.

QUALITATIVE RESEARCH
Interviews, observational research, collaborated with third party research organization and internal customer insights for research analysis.

A comparison chart of different children's toothbrushes showing user experience, features, drawbacks, capabilities, and open questions, with images of toothbrushes and timers at the top.

COMPETITOR RESEARCH
Understanding competitors by testing products, interview with actual users and read customer reviews to define Pros and Cons.

Hand-drawn diagrams and notes explaining the features and usage of electric toothbrushes, including illustrations of toothbrush models, sensors, LED indicators, and a child using the ON/OFF button.

IDEATION
Explored ideas through quick sketches and review directions with internal stakeholders.

A collage of images showing various electric toothbrushes and their features, including different colors and designs, along with children using the toothbrushes and smiling.

CONCEPT DESIGN
Refined sketches through 3 main concept directions based on Good-Better-Best strategy and differentiated the designs through its own innovative features.

Technical drawing of a Sonic the Hedgehog themed oral care toothbrush named 'Kimble.' It shows side views with labelled parts, color and material specifications, and branding details, including a Sonic the Hedgehog head logo and artwork. The bottom portion includes a color palette and character design references.

LICENSE MANAGEMENT
Based on customers’ feedback, design was refined and partnered with both internal and external License Management team on character applications.

A detailed flowchart or diagram related to Sonic the Hedgehog, featuring instructions, connections, and color-coded zones with text boxes, icons, and schedules.

UX & UI
Collaborated with Marketing lead, License Manager and external software design team to build the interactive user interface and the sound effect as well as getting it approved through the Licensors.

Detail view of a cross-functional team’s feedback storm on user behaviors and needs

Detail view of sound, light, and vibration UX sequences

Collaboration with a Mechanical Engineer, Software Developers, Marketing & License Management

Exploded view of a Sonic the Hedgehog-themed electric toy water gun
A Sonic the Hedgehog themed children's electric toothbrush with a blue body, yellow accents, and Sonic logo, featuring Sonic's face on the handle.

FEATURE

A blue Sonic the Hedgehog mask with green eyes, beige muzzle, and yellow interior on the ears.

ANTIBACTERIAL COVER
The 3D antibacterial toothbrush cover contains silver which naturally inhibits bacterial growth to help protect your child's toothbrush.

Electric toothbrush with replaceable brush heads.

KID-SIZED
The small toothbrush head and soft bristles are designed to gently and effectively remove plaque from along the gum line.

A blank white image with a blue border.
A humorous illustration of a toothbrush with an oil drill bit attached, including a diagram showing four zones of the toothbrush.

FEELS LIKE PLAYING A VIDEO GAME
Interactive LED lighting and sound effects teach kids how to brush better and longer to reach their daily goals.

Colorful cartoon illustration of Sonic the Hedgehog and Tails from the Sonic the Hedgehog series, with Sonic pointing and both characters smiling, accompanied by the text '100 Easy'.

EMOTIONAL VALUE
Sonic the Hedgehog and his friends are one of kids’ all time favorites. Kids feel connected to them as new video games and movies were introduced.

PLATFORM DESIGN STRATEGY & EXTENDABILITY

The Firefly Kids Play Action™ toothbrush was developed as a flagship, premium-positioned product within the Firefly brand ecosystem. The core design was intentionally created as a durable, neutral platform rather than a single character execution.

This approach enables the base product architecture to support multiple SKU variations, including gender-specific editions and licensed character integrations, without requiring structural redesign.

Beyond visual customization, the system was designed to accommodate future expansion of sound UX, interactive play patterns, and digital engagement features, allowing the product to evolve with emerging technologies and shifting market expectations.

This establishes a scalable design foundation that can extend across future product generations while maintaining consistency in usability, manufacturing efficiency, and brand experience.

Product system designed by Simon, with subsequent SKU development by Rooz Mousavi.
Patent document detailing an electric toothbrush design, including technical drawings and descriptions of the toothbrush's mirror image features.
Line drawing of an electric toothbrush with a power button and two additional controls on its handle, a round brush head at the top, and shown on a patent document dated March 25, 2025.
Close-up of Sonic the Hedgehog, Tails, and Knuckles from the Sonic the Hedgehog game series, with a blue background featuring pixelated squares.